---
_id: '4192'
abstract:
- lang: eng
text: "During vertebrate gastrulation, the body axis is established by a variety
of co-ordinated and directed movements of cells. One of these movements is convergence
and extension (CE), which is regulated by a non-canonical Wnt/planar cell polarity
(PCP) pathway. From our forward genetic screen, we have identified 3-hydroxy-3-methyglutaryl-coenzyme
A reductase 1b (hmgcr1b) gene as a dominant enhancer of the silberblick (slb)/wnt11
CE phenotype. hmgcr1b mutant embryos exhibit only very mild CE phenotype during
gastrulation while showing a thicker yolk extension at pharyngula stages. Notably,
abrogation of hmgcr1b also enhances the CE defects of other core PCP mutants/morphants.
The prenylation pathway is one of branches downstream of HMGCR, and has been implicated
for lipid modification at the C-terminus of proteins. To test the possibility
that the prenylation pathway regulates activities of the PCP pathway, we abrogated
farnesyl transferase (FT) or geranylgeranyl transferase (GGT) function using morpholinos
on PCP mutant/morphant backgrounds. Consistent with the notion that FT preferentially
performs lipid modification on to proteins with the CAAX motif including the core
PCP protein Prickle (Pk), abrogation of FT, but not GGT, enhances the pk1a or
pk1b morphant CE phenotype, suggesting the specif icity for targets of the prenylation
enzymes.\r\n"
article_processing_charge: No
author:
- first_name: Masatake
full_name: Kai, Masatake
last_name: Kai
- first_name: Nina
full_name: Buchan, Nina
last_name: Buchan
- first_name: Carl-Philipp J
full_name: Heisenberg, Carl-Philipp J
id: 39427864-F248-11E8-B48F-1D18A9856A87
last_name: Heisenberg
orcid: 0000-0002-0912-4566
- first_name: Masazumi
full_name: Tada, Masazumi
last_name: Tada
citation:
ama: Kai M, Buchan N, Heisenberg C-PJ, Tada M. Regulation of planar cell polarity
signalling by the prenylation pathway. Mechanisms of Development. 2009;126(Supplement
1):S132-S132. doi:10.1016/j.mod.2009.06.269
apa: Kai, M., Buchan, N., Heisenberg, C.-P. J., & Tada, M. (2009). Regulation
of planar cell polarity signalling by the prenylation pathway. Mechanisms of
Development. Elsevier. https://doi.org/10.1016/j.mod.2009.06.269
chicago: Kai, Masatake, Nina Buchan, Carl-Philipp J Heisenberg, and Masazumi Tada.
“Regulation of Planar Cell Polarity Signalling by the Prenylation Pathway.” Mechanisms
of Development. Elsevier, 2009. https://doi.org/10.1016/j.mod.2009.06.269.
ieee: M. Kai, N. Buchan, C.-P. J. Heisenberg, and M. Tada, “Regulation of planar
cell polarity signalling by the prenylation pathway,” Mechanisms of Development,
vol. 126, no. Supplement 1. Elsevier, pp. S132–S132, 2009.
ista: Kai M, Buchan N, Heisenberg C-PJ, Tada M. 2009. Regulation of planar cell
polarity signalling by the prenylation pathway. Mechanisms of Development. 126(Supplement
1), S132–S132.
mla: Kai, Masatake, et al. “Regulation of Planar Cell Polarity Signalling by the
Prenylation Pathway.” Mechanisms of Development, vol. 126, no. Supplement
1, Elsevier, 2009, pp. S132–S132, doi:10.1016/j.mod.2009.06.269.
short: M. Kai, N. Buchan, C.-P.J. Heisenberg, M. Tada, Mechanisms of Development
126 (2009) S132–S132.
date_created: 2018-12-11T12:07:30Z
date_published: 2009-08-05T00:00:00Z
date_updated: 2021-01-12T07:55:11Z
day: '05'
doi: 10.1016/j.mod.2009.06.269
extern: '1'
intvolume: ' 126'
issue: Supplement 1
language:
- iso: eng
month: '08'
oa_version: None
page: S132 - S132
publication: Mechanisms of Development
publication_status: published
publisher: Elsevier
publist_id: '1927'
status: public
title: Regulation of planar cell polarity signalling by the prenylation pathway
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 126
year: '2009'
...
---
_id: '4206'
abstract:
- lang: eng
text: Dorsal closure (DC), the closure of a hole in the dorsal epidermis of Drosophila
embryos by the joining of opposing epithelial cell sheets, has been used as a
model process to study the molecular and cellular mechanisms underlying epithelial
spreading and wound healing. Recent studies have provided novel insights into
how different tissues function cooperatively in this process. Specifically, they
demonstrate a critical function of the epidermis surrounding the hole in modulating
the behavior of the amnioserosa cells inside. These findings shed light not only
on the mechanisms by which the behavior of different tissues is coordinated during
DC, but also on the general mechanisms by which tissues interact to trigger global
morphogenesis, an essential but yet poorly explored aspect of embryogenesis.
article_processing_charge: No
author:
- first_name: Carl-Philipp J
full_name: Heisenberg, Carl-Philipp J
id: 39427864-F248-11E8-B48F-1D18A9856A87
last_name: Heisenberg
orcid: 0000-0002-0912-4566
citation:
ama: 'Heisenberg C-PJ. Dorsal closure in Drosophila: cells cannot get out of the
tight spot. Bioessays : News and Reviews in Molecular, Cellular and Developmental
Biology. 2009;31(12):1284-1287. doi:10.1002/bies.200900109'
apa: 'Heisenberg, C.-P. J. (2009). Dorsal closure in Drosophila: cells cannot get
out of the tight spot. Bioessays : News and Reviews in Molecular, Cellular
and Developmental Biology. Wiley-Blackwell. https://doi.org/10.1002/bies.200900109'
chicago: 'Heisenberg, Carl-Philipp J. “Dorsal Closure in Drosophila: Cells Cannot
Get out of the Tight Spot.” Bioessays : News and Reviews in Molecular, Cellular
and Developmental Biology. Wiley-Blackwell, 2009. https://doi.org/10.1002/bies.200900109.'
ieee: 'C.-P. J. Heisenberg, “Dorsal closure in Drosophila: cells cannot get out
of the tight spot,” Bioessays : News and Reviews in Molecular, Cellular and
Developmental Biology, vol. 31, no. 12. Wiley-Blackwell, pp. 1284–1287, 2009.'
ista: 'Heisenberg C-PJ. 2009. Dorsal closure in Drosophila: cells cannot get out
of the tight spot. Bioessays : News and Reviews in Molecular, Cellular and Developmental
Biology. 31(12), 1284–1287.'
mla: 'Heisenberg, Carl-Philipp J. “Dorsal Closure in Drosophila: Cells Cannot Get
out of the Tight Spot.” Bioessays : News and Reviews in Molecular, Cellular
and Developmental Biology, vol. 31, no. 12, Wiley-Blackwell, 2009, pp. 1284–87,
doi:10.1002/bies.200900109.'
short: 'C.-P.J. Heisenberg, Bioessays : News and Reviews in Molecular, Cellular
and Developmental Biology 31 (2009) 1284–1287.'
date_created: 2018-12-11T12:07:35Z
date_published: 2009-12-01T00:00:00Z
date_updated: 2021-01-12T07:55:17Z
day: '01'
doi: 10.1002/bies.200900109
extern: '1'
intvolume: ' 31'
issue: '12'
language:
- iso: eng
month: '12'
oa_version: None
page: 1284 - 1287
publication: 'Bioessays : News and Reviews in Molecular, Cellular and Developmental
Biology'
publication_status: published
publisher: Wiley-Blackwell
publist_id: '1911'
status: public
title: 'Dorsal closure in Drosophila: cells cannot get out of the tight spot'
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 31
year: '2009'
...
---
_id: '4217'
abstract:
- lang: eng
text: Nuclear movements play an essential role in metazoan development. Although
the intracellular transport mechanisms underlying nuclear movements have been
studied in detail, relatively little is known about signals from surrounding cells
and tissues controlling these movements. Here, we show that, in gastrulating zebrafish
embryos, convergence movements of nuclei within the yolk syncytial layer (YSL)
are guided by mesoderm and endoderm progenitors migrating along the surface of
the yolk towards the dorsal side of the developing gastrula. Progenitor cells
direct the convergence movements of internal yolk syncytial nuclei (iYSN) by modulating
cortical flow within the YSL in which the iYSN are entrained. The effect of mesoderm
and endoderm progenitors on the convergence movement of iYSN depends on the expression
of E-cadherin, indicating that adhesive contact between the cells and the YSL
is required for the mesendoderm-modulated YSL cortical flow mediating nuclear
convergence. In summary, our data reveal a crucial function for cortical flow
in the coordination of syncytial nuclear movements with surrounding cells and
tissues during zebrafish gastrulation.
article_processing_charge: No
author:
- first_name: Lara
full_name: Carvalho, Lara
last_name: Carvalho
- first_name: Jan
full_name: Stuehmer, Jan
last_name: Stuehmer
- first_name: Justin
full_name: Bois, Justin
last_name: Bois
- first_name: Yannis
full_name: Kalaidzidis, Yannis
last_name: Kalaidzidis
- first_name: Virginie
full_name: Lecaudey, Virginie
last_name: Lecaudey
- first_name: Carl-Philipp J
full_name: Heisenberg, Carl-Philipp J
id: 39427864-F248-11E8-B48F-1D18A9856A87
last_name: Heisenberg
orcid: 0000-0002-0912-4566
citation:
ama: Carvalho L, Stuehmer J, Bois J, Kalaidzidis Y, Lecaudey V, Heisenberg C-PJ.
Control of convergent yolk syncytial layer nuclear movement in zebrafish. Development.
2009;136(8):1305-1315. doi:10.1242/dev.026922
apa: Carvalho, L., Stuehmer, J., Bois, J., Kalaidzidis, Y., Lecaudey, V., &
Heisenberg, C.-P. J. (2009). Control of convergent yolk syncytial layer nuclear
movement in zebrafish. Development. Company of Biologists. https://doi.org/10.1242/dev.026922
chicago: Carvalho, Lara, Jan Stuehmer, Justin Bois, Yannis Kalaidzidis, Virginie
Lecaudey, and Carl-Philipp J Heisenberg. “Control of Convergent Yolk Syncytial
Layer Nuclear Movement in Zebrafish.” Development. Company of Biologists,
2009. https://doi.org/10.1242/dev.026922.
ieee: L. Carvalho, J. Stuehmer, J. Bois, Y. Kalaidzidis, V. Lecaudey, and C.-P.
J. Heisenberg, “Control of convergent yolk syncytial layer nuclear movement in
zebrafish,” Development, vol. 136, no. 8. Company of Biologists, pp. 1305–1315,
2009.
ista: Carvalho L, Stuehmer J, Bois J, Kalaidzidis Y, Lecaudey V, Heisenberg C-PJ.
2009. Control of convergent yolk syncytial layer nuclear movement in zebrafish.
Development. 136(8), 1305–1315.
mla: Carvalho, Lara, et al. “Control of Convergent Yolk Syncytial Layer Nuclear
Movement in Zebrafish.” Development, vol. 136, no. 8, Company of Biologists,
2009, pp. 1305–15, doi:10.1242/dev.026922.
short: L. Carvalho, J. Stuehmer, J. Bois, Y. Kalaidzidis, V. Lecaudey, C.-P.J. Heisenberg,
Development 136 (2009) 1305–1315.
date_created: 2018-12-11T12:07:39Z
date_published: 2009-04-15T00:00:00Z
date_updated: 2021-01-12T07:55:22Z
day: '15'
doi: 10.1242/dev.026922
extern: '1'
intvolume: ' 136'
issue: '8'
language:
- iso: eng
month: '04'
oa_version: None
page: 1305 - 1315
publication: Development
publication_status: published
publisher: Company of Biologists
publist_id: '1901'
status: public
title: Control of convergent yolk syncytial layer nuclear movement in zebrafish
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 136
year: '2009'
...
---
_id: '4223'
abstract:
- lang: eng
text: 'Both Gram-positive and Gram-negative bacteria contain bactoprenol-dependent
biosynthetic pathways expressing non-essential cell surface polysaccharides that
function as virulence factors. Although these polymers are not required for bacterial
viability in vitro, genes in many of the biosynthetic pathways are conditionally
essential: they cannot be deleted except in strains incapable of initiating polymer
synthesis. We report a cell-based, pathway-specific strategy to screen for small
molecule inhibitors of conditionally essential enzymes. The screen identifies
molecules that prevent the growth of a wildtype bacterial strain but do not affect
the growth of a mutant strain incapable of initiating polymer synthesis. We have
applied this approach to discover inhibitors of wall teichoic acid (WTA) biosynthesis
in Staphylococcus aureus. WTAs are anionic cell surface polysaccharides required
for host colonization that have been suggested as targets for new antimicrobials.
We have identified a small molecule, 7-chloro-N,N-diethyl-3-(phenylsulfonyl)-[1,2,3]triazolo[1,5-a]quinolin-5-amine
(1835F03), that inhibits the growth of a panel of S. aureus strains (MIC = 1−3
μg mL−1), including clinical methicillin-resistant S. aureus (MRSA) isolates.
Using a combination of biochemistry and genetics, we have identified the molecular
target as TarG, the transmembrane component of the ABC transporter that exports
WTAs to the cell surface. We also show that preventing the completion of WTA biosynthesis
once it has been initiated triggers growth arrest. The discovery of 1835F03 validates
our chemical genetics strategy for identifying inhibitors of conditionally essential
enzymes, and the strategy should be applicable to many other bactoprenol-dependent
biosynthetic pathways in the pursuit of novel antibacterials and probes of bacterial
stress responses.'
article_processing_charge: No
author:
- first_name: Jonathan
full_name: Swoboda, Jonathan
last_name: Swoboda
- first_name: Timothy
full_name: Meredith, Timothy
last_name: Meredith
- first_name: Jennifer
full_name: Campbell, Jennifer
last_name: Campbell
- first_name: Stephanie
full_name: Brown, Stephanie
last_name: Brown
- first_name: Takashi
full_name: Suzuki, Takashi
last_name: Suzuki
- first_name: Mark Tobias
full_name: Bollenbach, Mark Tobias
id: 3E6DB97A-F248-11E8-B48F-1D18A9856A87
last_name: Bollenbach
orcid: 0000-0003-4398-476X
- first_name: Amy
full_name: Malhowski, Amy
last_name: Malhowski
- first_name: Roy
full_name: Kishony, Roy
last_name: Kishony
- first_name: Michael
full_name: Gilmore, Michael
last_name: Gilmore
- first_name: Suzanne
full_name: Walker, Suzanne
last_name: Walker
citation:
ama: Swoboda J, Meredith T, Campbell J, et al. Discovery of a Small Molecule that
Blocks Wall Teichoic Acid Biosynthesis in Staphylococcus aureus. ACS Chemical
Biology. 2009;4(10):875-883. doi:10.1021/cb900151k
apa: Swoboda, J., Meredith, T., Campbell, J., Brown, S., Suzuki, T., Bollenbach,
M. T., … Walker, S. (2009). Discovery of a Small Molecule that Blocks Wall Teichoic
Acid Biosynthesis in Staphylococcus aureus. ACS Chemical Biology. American
Chemical Society. https://doi.org/10.1021/cb900151k
chicago: Swoboda, Jonathan, Timothy Meredith, Jennifer Campbell, Stephanie Brown,
Takashi Suzuki, Mark Tobias Bollenbach, Amy Malhowski, Roy Kishony, Michael Gilmore,
and Suzanne Walker. “Discovery of a Small Molecule That Blocks Wall Teichoic Acid
Biosynthesis in Staphylococcus Aureus.” ACS Chemical Biology. American
Chemical Society, 2009. https://doi.org/10.1021/cb900151k.
ieee: J. Swoboda et al., “Discovery of a Small Molecule that Blocks Wall
Teichoic Acid Biosynthesis in Staphylococcus aureus,” ACS Chemical Biology,
vol. 4, no. 10. American Chemical Society, pp. 875–883, 2009.
ista: Swoboda J, Meredith T, Campbell J, Brown S, Suzuki T, Bollenbach MT, Malhowski
A, Kishony R, Gilmore M, Walker S. 2009. Discovery of a Small Molecule that Blocks
Wall Teichoic Acid Biosynthesis in Staphylococcus aureus. ACS Chemical Biology.
4(10), 875–883.
mla: Swoboda, Jonathan, et al. “Discovery of a Small Molecule That Blocks Wall Teichoic
Acid Biosynthesis in Staphylococcus Aureus.” ACS Chemical Biology, vol.
4, no. 10, American Chemical Society, 2009, pp. 875–83, doi:10.1021/cb900151k.
short: J. Swoboda, T. Meredith, J. Campbell, S. Brown, T. Suzuki, M.T. Bollenbach,
A. Malhowski, R. Kishony, M. Gilmore, S. Walker, ACS Chemical Biology 4 (2009)
875–883.
date_created: 2018-12-11T12:07:41Z
date_published: 2009-08-18T00:00:00Z
date_updated: 2021-01-12T07:55:25Z
day: '18'
doi: 10.1021/cb900151k
extern: '1'
intvolume: ' 4'
issue: '10'
language:
- iso: eng
main_file_link:
- url: 10.1021/cb900151k [doi]
month: '08'
oa_version: None
page: 875 - 883
publication: ACS Chemical Biology
publication_status: published
publisher: American Chemical Society
publist_id: '1894'
status: public
title: Discovery of a Small Molecule that Blocks Wall Teichoic Acid Biosynthesis in
Staphylococcus aureus
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 4
year: '2009'
...
---
_id: '4228'
abstract:
- lang: eng
text: Suppressive drug interactions, in which one antibiotic can actually help bacterial
cells to grow faster in the presence of another, occur between protein and DNA
synthesis inhibitors. Here, we show that this suppression results from nonoptimal
regulation of ribosomal genes in the presence of DNA stress. Using GFP-tagged
transcription reporters in Escherichia coli, we find that ribosomal genes are
not directly regulated by DNA stress, leading to an imbalance between cellular
DNA and protein content. To test whether ribosomal gene expression under DNA stress
is nonoptimal for growth rate, we sequentially deleted up to six of the seven
ribosomal RNA operons. These synthetic manipulations of ribosomal gene expression
correct the protein-DNA imbalance, lead to improved survival and growth, and completely
remove the suppressive drug interaction. A simple mathematical model explains
the nonoptimal regulation in different nutrient environments. These results reveal
the genetic mechanism underlying an important class of suppressive drug interactions.
author:
- first_name: Tobias
full_name: Bollenbach, Tobias
last_name: Bollenbach
- first_name: Selwyn
full_name: Quan, Selwyn
last_name: Quan
- first_name: Remy P
full_name: Remy Chait
id: 3464AE84-F248-11E8-B48F-1D18A9856A87
last_name: Chait
orcid: 0000-0003-0876-3187
- first_name: Roy
full_name: Kishony, Roy
last_name: Kishony
citation:
ama: Bollenbach T, Quan S, Chait RP, Kishony R. Nonoptimal Microbial Response to
Antibiotics Underlies Suppressive Drug Interactions. Cell. 2009;139(4):707-718.
doi:10.1016/j.cell.2009.10.025
apa: Bollenbach, T., Quan, S., Chait, R. P., & Kishony, R. (2009). Nonoptimal
Microbial Response to Antibiotics Underlies Suppressive Drug Interactions. Cell.
Cell Press. https://doi.org/10.1016/j.cell.2009.10.025
chicago: Bollenbach, Tobias, Selwyn Quan, Remy P Chait, and Roy Kishony. “Nonoptimal
Microbial Response to Antibiotics Underlies Suppressive Drug Interactions.” Cell.
Cell Press, 2009. https://doi.org/10.1016/j.cell.2009.10.025.
ieee: T. Bollenbach, S. Quan, R. P. Chait, and R. Kishony, “Nonoptimal Microbial
Response to Antibiotics Underlies Suppressive Drug Interactions,” Cell,
vol. 139, no. 4. Cell Press, pp. 707–718, 2009.
ista: Bollenbach T, Quan S, Chait RP, Kishony R. 2009. Nonoptimal Microbial Response
to Antibiotics Underlies Suppressive Drug Interactions. Cell. 139(4), 707–718.
mla: Bollenbach, Tobias, et al. “Nonoptimal Microbial Response to Antibiotics Underlies
Suppressive Drug Interactions.” Cell, vol. 139, no. 4, Cell Press, 2009,
pp. 707–18, doi:10.1016/j.cell.2009.10.025.
short: T. Bollenbach, S. Quan, R.P. Chait, R. Kishony, Cell 139 (2009) 707–718.
date_created: 2018-12-11T12:07:43Z
date_published: 2009-01-01T00:00:00Z
date_updated: 2021-01-12T07:55:27Z
day: '01'
doi: 10.1016/j.cell.2009.10.025
extern: 1
intvolume: ' 139'
issue: '4'
month: '01'
page: 707 - 718
publication: Cell
publication_status: published
publisher: Cell Press
publist_id: '1890'
quality_controlled: 0
status: public
title: Nonoptimal Microbial Response to Antibiotics Underlies Suppressive Drug Interactions
type: journal_article
volume: 139
year: '2009'
...
---
_id: '4231'
abstract:
- lang: eng
text: The evolution of quantitative characters depends on the frequencies of the
alleles involved, yet these frequencies cannot usually be measured. Previous groups
have proposed an approximation to the dynamics of quantitative traits, based on
an analogy with statistical mechanics. We present a modified version of that approach,
which makes the analogy more precise and applies quite generally to describe the
evolution of allele frequencies. We calculate explicitly how the macroscopic quantities
(i.e., quantities that depend on the quantitative trait) depend on evolutionary
forces, in a way that is independent of the microscopic details. We first show
that the stationary distribution of allele frequencies under drift, selection,
and mutation maximizes a certain measure of entropy, subject to constraints on
the expectation of observable quantities. We then approximate the dynamical changes
in these expectations, assuming that the distribution of allele frequencies always
maximizes entropy, conditional on the expected values. When applied to directional
selection on an additive trait, this gives a very good approximation to the evolution
of the trait mean and the genetic variance, when the number of mutations per generation
is sufficiently high (4Nμ > 1). We show how the method can be modified for
small mutation rates (4Nμ → 0). We outline how this method describes epistatic
interactions as, for example, with stabilizing selection.
acknowledgement: "N.B. was supported by the Engineering and Physical Sciences Research
Council (GR/T11753 and GR/T19537) and by the Royal Society.\r\nWe are grateful to
Ellen Baake for helping to initiate this project and for her comments on this manuscript.
We also thank Michael Turelli for his comments on the manuscript and I. Pen for
discussions and support in this project. This project was a result of a collaboration
supported by the European Science Foundation grant “Integrating population genetics
and conservation biology.” "
article_processing_charge: No
author:
- first_name: Nicholas H
full_name: Barton, Nicholas H
id: 4880FE40-F248-11E8-B48F-1D18A9856A87
last_name: Barton
orcid: 0000-0002-8548-5240
- first_name: Harold
full_name: De Vladar, Harold
last_name: De Vladar
citation:
ama: Barton NH, De Vladar H. Statistical mechanics and the evolution of polygenic
quantitative traits. Genetics. 2009;181(3):997-1011. doi:10.1534/genetics.108.099309
apa: Barton, N. H., & De Vladar, H. (2009). Statistical mechanics and the evolution
of polygenic quantitative traits. Genetics. Genetics Society of America.
https://doi.org/10.1534/genetics.108.099309
chicago: Barton, Nicholas H, and Harold De Vladar. “Statistical Mechanics and the
Evolution of Polygenic Quantitative Traits.” Genetics. Genetics Society
of America, 2009. https://doi.org/10.1534/genetics.108.099309.
ieee: N. H. Barton and H. De Vladar, “Statistical mechanics and the evolution of
polygenic quantitative traits,” Genetics, vol. 181, no. 3. Genetics Society
of America, pp. 997–1011, 2009.
ista: Barton NH, De Vladar H. 2009. Statistical mechanics and the evolution of polygenic
quantitative traits. Genetics. 181(3), 997–1011.
mla: Barton, Nicholas H., and Harold De Vladar. “Statistical Mechanics and the Evolution
of Polygenic Quantitative Traits.” Genetics, vol. 181, no. 3, Genetics
Society of America, 2009, pp. 997–1011, doi:10.1534/genetics.108.099309.
short: N.H. Barton, H. De Vladar, Genetics 181 (2009) 997–1011.
corr_author: '1'
date_created: 2018-12-11T12:07:44Z
date_published: 2009-03-01T00:00:00Z
date_updated: 2025-09-30T09:52:35Z
day: '01'
department:
- _id: NiBa
doi: 10.1534/genetics.108.099309
external_id:
isi:
- '000270213500018'
intvolume: ' 181'
isi: 1
issue: '3'
language:
- iso: eng
month: '03'
oa_version: None
page: 997 - 1011
publication: Genetics
publication_status: published
publisher: Genetics Society of America
publist_id: '1882'
quality_controlled: '1'
scopus_import: '1'
status: public
title: Statistical mechanics and the evolution of polygenic quantitative traits
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 181
year: '2009'
...
---
_id: '4232'
article_processing_charge: No
author:
- first_name: Harold
full_name: Vladar, Harold
id: 2A181218-F248-11E8-B48F-1D18A9856A87
last_name: Vladar
orcid: 0000-0002-5985-7653
citation:
ama: de Vladar H. Stochasticity and Variability in the dynamics and genetics of
populations. 2009.
apa: de Vladar, H. (2009). Stochasticity and Variability in the dynamics and
genetics of populations. Faculty of mathematical and natural sciences, University
of Groningen.
chicago: Vladar, Harold de. “Stochasticity and Variability in the Dynamics and Genetics
of Populations.” Faculty of mathematical and natural sciences, University of Groningen,
2009.
ieee: H. de Vladar, “Stochasticity and Variability in the dynamics and genetics
of populations,” Faculty of mathematical and natural sciences, University of Groningen,
2009.
ista: de Vladar H. 2009. Stochasticity and Variability in the dynamics and genetics
of populations. Faculty of mathematical and natural sciences, University of Groningen.
mla: de Vladar, Harold. Stochasticity and Variability in the Dynamics and Genetics
of Populations. Faculty of mathematical and natural sciences, University of
Groningen, 2009.
short: H. de Vladar, Stochasticity and Variability in the Dynamics and Genetics
of Populations, Faculty of mathematical and natural sciences, University of Groningen,
2009.
date_created: 2018-12-11T12:07:44Z
date_published: 2009-01-01T00:00:00Z
date_updated: 2025-07-02T06:46:07Z
day: '01'
extern: '1'
language:
- iso: eng
month: '01'
oa_version: None
publication_status: published
publisher: Faculty of mathematical and natural sciences, University of Groningen
publist_id: '1883'
status: public
title: Stochasticity and Variability in the dynamics and genetics of populations
type: dissertation
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
year: '2009'
...
---
_id: '4242'
abstract:
- lang: eng
text: 'Felsenstein distinguished two ways by which selection can directly strengthen
isolation. First, a modifier that strengthens prezygotic isolation can be favored
everywhere. This fits with the traditional view of reinforcement as an adaptation
to reduce deleterious hybridization by strengthening assortative mating. Second,
selection can favor association between different incompatibilities, despite recombination.
We generalize this “two allele” model to follow associations among any number
of incompatibilities, which may include both assortment and hybrid inviability.
Our key argument is that this process, of coupling between incompatibilities,
may be quite different from the usual view of reinforcement: strong isolation
can evolve through the coupling of any kind of incompatibility, whether prezygotic
or postzygotic. Single locus incompatibilities become coupled because associations
between them increase the variance in compatibility, which in turn increases mean
fitness if there is positive epistasis. Multiple incompatibilities, each maintained
by epistasis, can become coupled in the same way. In contrast, a single-locus
incompatibility can become coupled with loci that reduce the viability of haploid
hybrids because this reduces harmful recombination. We obtain simple approximations
for the limits of tight linkage, and strong assortment, and show how assortment
alleles can invade through associations with other components of reproductive
isolation.'
acknowledgement: "This work was supported by a Royal Society/Wolfson Research Merit
award, and by a grant from the Natural Environment Research Council.\r\nWe are very
grateful for insightful comments from S. P. Otto, and for helpful suggestions from
the referees and the Associate Editor, Maria Servedio."
article_processing_charge: No
author:
- first_name: Nicholas H
full_name: Barton, Nicholas H
id: 4880FE40-F248-11E8-B48F-1D18A9856A87
last_name: Barton
orcid: 0000-0002-8548-5240
- first_name: Maria
full_name: De Cara, Maria
last_name: De Cara
citation:
ama: Barton NH, De Cara M. The evolution of strong reproductive isolation. Evolution;
International Journal of Organic Evolution. 2009;63(5):1171-1190. doi:10.1111/j.1558-5646.2009.00622.x
apa: Barton, N. H., & De Cara, M. (2009). The evolution of strong reproductive
isolation. Evolution; International Journal of Organic Evolution. Wiley.
https://doi.org/10.1111/j.1558-5646.2009.00622.x
chicago: Barton, Nicholas H, and Maria De Cara. “The Evolution of Strong Reproductive
Isolation.” Evolution; International Journal of Organic Evolution. Wiley,
2009. https://doi.org/10.1111/j.1558-5646.2009.00622.x.
ieee: N. H. Barton and M. De Cara, “The evolution of strong reproductive isolation,”
Evolution; International Journal of Organic Evolution, vol. 63, no. 5.
Wiley, pp. 1171–1190, 2009.
ista: Barton NH, De Cara M. 2009. The evolution of strong reproductive isolation.
Evolution; International Journal of Organic Evolution. 63(5), 1171–1190.
mla: Barton, Nicholas H., and Maria De Cara. “The Evolution of Strong Reproductive
Isolation.” Evolution; International Journal of Organic Evolution, vol.
63, no. 5, Wiley, 2009, pp. 1171–90, doi:10.1111/j.1558-5646.2009.00622.x.
short: N.H. Barton, M. De Cara, Evolution; International Journal of Organic Evolution
63 (2009) 1171–1190.
corr_author: '1'
date_created: 2018-12-11T12:07:48Z
date_published: 2009-05-01T00:00:00Z
date_updated: 2025-09-30T09:52:11Z
day: '01'
ddc:
- '570'
department:
- _id: NiBa
doi: 10.1111/j.1558-5646.2009.00622.x
external_id:
isi:
- '000265145800006'
file:
- access_level: open_access
checksum: 1920d2e25ef335833764256c1a47bbfb
content_type: application/pdf
creator: system
date_created: 2018-12-12T10:11:46Z
date_updated: 2020-07-14T12:46:25Z
file_id: '4903'
file_name: IST-2016-551-v1+1_BartonDeCaraRevNew.pdf
file_size: 720913
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- access_level: open_access
checksum: c1c51bbc10d4f328fc96fc5b0e5dc25d
content_type: application/pdf
creator: system
date_created: 2018-12-12T10:11:47Z
date_updated: 2020-07-14T12:46:25Z
file_id: '4904'
file_name: IST-2016-551-v1+2_BartonDeCaraRevNewSI.pdf
file_size: 290160
relation: main_file
file_date_updated: 2020-07-14T12:46:25Z
has_accepted_license: '1'
intvolume: ' 63'
isi: 1
issue: '5'
language:
- iso: eng
month: '05'
oa: 1
oa_version: Submitted Version
page: 1171 - 1190
publication: Evolution; International Journal of Organic Evolution
publication_status: published
publisher: Wiley
publist_id: '1866'
pubrep_id: '551'
quality_controlled: '1'
scopus_import: '1'
status: public
title: The evolution of strong reproductive isolation
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 63
year: '2009'
...
---
_id: '1766'
abstract:
- lang: eng
text: We demonstrate the time-resolved driving of two-photon blue sideband transitions
between superconducting qubits and a transmission line resonator. As an example
of using these sideband transitions for a two-qubit operation, we implement a
pulse sequence that first entangles one qubit with the resonator and subsequently
distributes the entanglement between two qubits. We show the generation of 75%
fidelity Bell states by this method. The full density matrix of the two-qubit
system is extracted using joint measurement and quantum state tomography and shows
close agreement with numerical simulation.
acknowledgement: This work was supported by ETH Zurich, the Swiss National Science
Foundation, and by the EC via the EuroSQIP project and the Marie-Curie program (P.
J. L.)
author:
- first_name: Peter
full_name: Leek, Peter J
last_name: Leek
- first_name: Stefan
full_name: Filipp, Stefan
last_name: Filipp
- first_name: Patrick
full_name: Maurer, Patrick
last_name: Maurer
- first_name: Matthias
full_name: Baur, Matthias P
last_name: Baur
- first_name: R
full_name: Bianchetti, R
last_name: Bianchetti
- first_name: Johannes M
full_name: Johannes Fink
id: 4B591CBA-F248-11E8-B48F-1D18A9856A87
last_name: Fink
orcid: 0000-0001-8112-028X
- first_name: M
full_name: Göppl, M
last_name: Göppl
- first_name: L.
full_name: Steffen, L. Kraig
last_name: Steffen
- first_name: Andreas
full_name: Wallraff, Andreas
last_name: Wallraff
citation:
ama: Leek P, Filipp S, Maurer P, et al. Using sideband transitions for two-qubit
operations in superconducting circuits. Physical Review B - Condensed Matter
and Materials Physics. 2009;79(18). doi:10.1103/PhysRevB.79.180511
apa: Leek, P., Filipp, S., Maurer, P., Baur, M., Bianchetti, R., Fink, J. M., …
Wallraff, A. (2009). Using sideband transitions for two-qubit operations in superconducting
circuits. Physical Review B - Condensed Matter and Materials Physics. American
Physical Society. https://doi.org/10.1103/PhysRevB.79.180511
chicago: Leek, Peter, Stefan Filipp, Patrick Maurer, Matthias Baur, R Bianchetti,
Johannes M Fink, M Göppl, L. Steffen, and Andreas Wallraff. “Using Sideband Transitions
for Two-Qubit Operations in Superconducting Circuits.” Physical Review B -
Condensed Matter and Materials Physics. American Physical Society, 2009. https://doi.org/10.1103/PhysRevB.79.180511.
ieee: P. Leek et al., “Using sideband transitions for two-qubit operations
in superconducting circuits,” Physical Review B - Condensed Matter and Materials
Physics, vol. 79, no. 18. American Physical Society, 2009.
ista: Leek P, Filipp S, Maurer P, Baur M, Bianchetti R, Fink JM, Göppl M, Steffen
L, Wallraff A. 2009. Using sideband transitions for two-qubit operations in superconducting
circuits. Physical Review B - Condensed Matter and Materials Physics. 79(18).
mla: Leek, Peter, et al. “Using Sideband Transitions for Two-Qubit Operations in
Superconducting Circuits.” Physical Review B - Condensed Matter and Materials
Physics, vol. 79, no. 18, American Physical Society, 2009, doi:10.1103/PhysRevB.79.180511.
short: P. Leek, S. Filipp, P. Maurer, M. Baur, R. Bianchetti, J.M. Fink, M. Göppl,
L. Steffen, A. Wallraff, Physical Review B - Condensed Matter and Materials Physics
79 (2009).
date_created: 2018-12-11T11:53:54Z
date_published: 2009-05-01T00:00:00Z
date_updated: 2021-01-12T06:53:04Z
day: '01'
doi: 10.1103/PhysRevB.79.180511
extern: 1
intvolume: ' 79'
issue: '18'
main_file_link:
- open_access: '1'
url: http://arxiv.org/abs/0812.2678
month: '05'
oa: 1
publication: Physical Review B - Condensed Matter and Materials Physics
publication_status: published
publisher: American Physical Society
publist_id: '5354'
quality_controlled: 0
status: public
title: Using sideband transitions for two-qubit operations in superconducting circuits
type: journal_article
volume: 79
year: '2009'
...
---
_id: '1767'
abstract:
- lang: eng
text: We present spectroscopic measurements of the Autler-Townes doublet and the
sidebands of the Mollow triplet in a driven superconducting qubit. The ground
to first excited state transition of the qubit is strongly pumped while the resulting
dressed qubit spectrum is probed with a weak tone. The corresponding transitions
are detected using dispersive readout of the qubit coupled off resonantly to a
microwave transmission line resonator. The observed frequencies of the Autler-Townes
and Mollow spectral lines are in good agreement with a dispersive Jaynes-Cummings
model taking into account higher excited qubit states and dispersive level shifts
due to off-resonant drives.
acknowledgement: This work was supported by the Swiss National Science Foundation
and by ETH Zürich. P. J. L. acknowledges support from the EC via an Intra-European
Marie-Curie Fellowship. A. B. was supported by NSERC, CIFAR, FQRNT, and Alfred P.
Sloan Foundation
author:
- first_name: Matthias
full_name: Baur, Matthias P
last_name: Baur
- first_name: Stefan
full_name: Filipp, Stefan
last_name: Filipp
- first_name: R
full_name: Bianchetti, R
last_name: Bianchetti
- first_name: Johannes M
full_name: Johannes Fink
id: 4B591CBA-F248-11E8-B48F-1D18A9856A87
last_name: Fink
orcid: 0000-0001-8112-028X
- first_name: M
full_name: Göppl, M
last_name: Göppl
- first_name: L.
full_name: Steffen, L. Kraig
last_name: Steffen
- first_name: Peter
full_name: Leek, Peter J
last_name: Leek
- first_name: Alexandre
full_name: Blais, Alexandre
last_name: Blais
- first_name: Andreas
full_name: Wallraff, Andreas
last_name: Wallraff
citation:
ama: Baur M, Filipp S, Bianchetti R, et al. Measurement of autler-townes and mollow
transitions in a strongly driven superconducting qubit. Physical Review Letters.
2009;102(24). doi:10.1103/PhysRevLett.102.243602
apa: Baur, M., Filipp, S., Bianchetti, R., Fink, J. M., Göppl, M., Steffen, L.,
… Wallraff, A. (2009). Measurement of autler-townes and mollow transitions in
a strongly driven superconducting qubit. Physical Review Letters. American
Physical Society. https://doi.org/10.1103/PhysRevLett.102.243602
chicago: Baur, Matthias, Stefan Filipp, R Bianchetti, Johannes M Fink, M Göppl,
L. Steffen, Peter Leek, Alexandre Blais, and Andreas Wallraff. “Measurement of
Autler-Townes and Mollow Transitions in a Strongly Driven Superconducting Qubit.”
Physical Review Letters. American Physical Society, 2009. https://doi.org/10.1103/PhysRevLett.102.243602.
ieee: M. Baur et al., “Measurement of autler-townes and mollow transitions
in a strongly driven superconducting qubit,” Physical Review Letters, vol.
102, no. 24. American Physical Society, 2009.
ista: Baur M, Filipp S, Bianchetti R, Fink JM, Göppl M, Steffen L, Leek P, Blais
A, Wallraff A. 2009. Measurement of autler-townes and mollow transitions in a
strongly driven superconducting qubit. Physical Review Letters. 102(24).
mla: Baur, Matthias, et al. “Measurement of Autler-Townes and Mollow Transitions
in a Strongly Driven Superconducting Qubit.” Physical Review Letters, vol.
102, no. 24, American Physical Society, 2009, doi:10.1103/PhysRevLett.102.243602.
short: M. Baur, S. Filipp, R. Bianchetti, J.M. Fink, M. Göppl, L. Steffen, P. Leek,
A. Blais, A. Wallraff, Physical Review Letters 102 (2009).
date_created: 2018-12-11T11:53:54Z
date_published: 2009-06-19T00:00:00Z
date_updated: 2021-01-12T06:53:04Z
day: '19'
doi: 10.1103/PhysRevLett.102.243602
extern: 1
intvolume: ' 102'
issue: '24'
main_file_link:
- open_access: '1'
url: http://arxiv.org/abs/0812.4384
month: '06'
oa: 1
publication: Physical Review Letters
publication_status: published
publisher: American Physical Society
publist_id: '5352'
quality_controlled: 0
status: public
title: Measurement of autler-townes and mollow transitions in a strongly driven superconducting
qubit
type: journal_article
volume: 102
year: '2009'
...
---
_id: '1768'
abstract:
- lang: eng
text: Quantum state tomography is an important tool in quantum information science
for complete characterization of multiqubit states and their correlations. Here
we report a method to perform a joint simultaneous readout of two superconducting
qubits dispersively coupled to the same mode of a microwave transmission line
resonator. The nonlinear dependence of the resonator transmission on the qubit
state dependent cavity frequency allows us to extract the full two-qubit correlations
without the need for single-shot readout of individual qubits. We employ standard
tomographic techniques to reconstruct the density matrix of two-qubit quantum
states.
acknowledgement: This work was supported by Swiss National Science Foundation (SNF)
and ETH Zurich. P. J. L. was supported by the EC with a MC-EIF, J. M. G. by CIFAR,
MRI, MITACS, and NSERC, and A. B. by NSERC and CIFAR
author:
- first_name: Stefan
full_name: Filipp, Stefan
last_name: Filipp
- first_name: Patrick
full_name: Maurer, Patrick
last_name: Maurer
- first_name: Peter
full_name: Leek, Peter J
last_name: Leek
- first_name: Matthias
full_name: Baur, Matthias P
last_name: Baur
- first_name: R
full_name: Bianchetti, R
last_name: Bianchetti
- first_name: Johannes M
full_name: Johannes Fink
id: 4B591CBA-F248-11E8-B48F-1D18A9856A87
last_name: Fink
orcid: 0000-0001-8112-028X
- first_name: M
full_name: Göppl, M
last_name: Göppl
- first_name: L.
full_name: Steffen, L. Kraig
last_name: Steffen
- first_name: Jay
full_name: Gambetta, Jay M
last_name: Gambetta
- first_name: Alexandre
full_name: Blais, Alexandre
last_name: Blais
- first_name: Andreas
full_name: Wallraff, Andreas
last_name: Wallraff
citation:
ama: Filipp S, Maurer P, Leek P, et al. Two-qubit state tomography using a joint
dispersive readout. Physical Review Letters. 2009;102(20). doi:10.1103/PhysRevLett.102.200402
apa: Filipp, S., Maurer, P., Leek, P., Baur, M., Bianchetti, R., Fink, J. M., …
Wallraff, A. (2009). Two-qubit state tomography using a joint dispersive readout.
Physical Review Letters. American Physical Society. https://doi.org/10.1103/PhysRevLett.102.200402
chicago: Filipp, Stefan, Patrick Maurer, Peter Leek, Matthias Baur, R Bianchetti,
Johannes M Fink, M Göppl, et al. “Two-Qubit State Tomography Using a Joint Dispersive
Readout.” Physical Review Letters. American Physical Society, 2009. https://doi.org/10.1103/PhysRevLett.102.200402.
ieee: S. Filipp et al., “Two-qubit state tomography using a joint dispersive
readout,” Physical Review Letters, vol. 102, no. 20. American Physical
Society, 2009.
ista: Filipp S, Maurer P, Leek P, Baur M, Bianchetti R, Fink JM, Göppl M, Steffen
L, Gambetta J, Blais A, Wallraff A. 2009. Two-qubit state tomography using a joint
dispersive readout. Physical Review Letters. 102(20).
mla: Filipp, Stefan, et al. “Two-Qubit State Tomography Using a Joint Dispersive
Readout.” Physical Review Letters, vol. 102, no. 20, American Physical
Society, 2009, doi:10.1103/PhysRevLett.102.200402.
short: S. Filipp, P. Maurer, P. Leek, M. Baur, R. Bianchetti, J.M. Fink, M. Göppl,
L. Steffen, J. Gambetta, A. Blais, A. Wallraff, Physical Review Letters 102 (2009).
date_created: 2018-12-11T11:53:54Z
date_published: 2009-05-18T00:00:00Z
date_updated: 2021-01-12T06:53:04Z
day: '18'
doi: 10.1103/PhysRevLett.102.200402
extern: 1
intvolume: ' 102'
issue: '20'
main_file_link:
- open_access: '1'
url: http://arxiv.org/abs/0812.2485
month: '05'
oa: 1
publication: Physical Review Letters
publication_status: published
publisher: American Physical Society
publist_id: '5353'
quality_controlled: 0
status: public
title: Two-qubit state tomography using a joint dispersive readout
type: journal_article
volume: 102
year: '2009'
...
---
_id: '1769'
abstract:
- lang: eng
text: We present an ideal realization of the Tavis-Cummings model in the absence
of atom number and coupling fluctuations by embedding a discrete number of fully
controllable superconducting qubits at fixed positions into a transmission line
resonator. Measuring the vacuum Rabi mode splitting with one, two, and three qubits
strongly coupled to the cavity field, we explore both bright and dark dressed
collective multiqubit states and observe the discrete N scaling of the collective
dipole coupling strength. Our experiments demonstrate a novel approach to explore
collective states, such as the W state, in a fully globally and locally controllable
quantum system. Our scalable approach is interesting for solid-state quantum information
processing and for fundamental multiatom quantum optics experiments with fixed
atom numbers.
acknowledgement: This work was supported by SNF Grant No. 200021-111899 and ETHZ.
P. J. L. was supported by the EU with a MC-EIF. A. B. was supported by NSERC, CIFAR,
and the Alfred P. Sloan Foundation
author:
- first_name: Johannes M
full_name: Johannes Fink
id: 4B591CBA-F248-11E8-B48F-1D18A9856A87
last_name: Fink
orcid: 0000-0001-8112-028X
- first_name: R
full_name: Bianchetti, R
last_name: Bianchetti
- first_name: Matthias
full_name: Baur, Matthias P
last_name: Baur
- first_name: M
full_name: Göppl, M
last_name: Göppl
- first_name: L.
full_name: Steffen, L. Kraig
last_name: Steffen
- first_name: Stefan
full_name: Filipp, Stefan
last_name: Filipp
- first_name: Peter
full_name: Leek, Peter J
last_name: Leek
- first_name: Alexandre
full_name: Blais, Alexandre
last_name: Blais
- first_name: Andreas
full_name: Wallraff, Andreas
last_name: Wallraff
citation:
ama: Fink JM, Bianchetti R, Baur M, et al. Dressed collective qubit states and the
Tavis-Cummings model in circuit QED. Physical Review Letters. 2009;103(8).
doi:10.1103/PhysRevLett.103.083601
apa: Fink, J. M., Bianchetti, R., Baur, M., Göppl, M., Steffen, L., Filipp, S.,
… Wallraff, A. (2009). Dressed collective qubit states and the Tavis-Cummings
model in circuit QED. Physical Review Letters. American Physical Society.
https://doi.org/10.1103/PhysRevLett.103.083601
chicago: Fink, Johannes M, R Bianchetti, Matthias Baur, M Göppl, L. Steffen, Stefan
Filipp, Peter Leek, Alexandre Blais, and Andreas Wallraff. “Dressed Collective
Qubit States and the Tavis-Cummings Model in Circuit QED.” Physical Review
Letters. American Physical Society, 2009. https://doi.org/10.1103/PhysRevLett.103.083601.
ieee: J. M. Fink et al., “Dressed collective qubit states and the Tavis-Cummings
model in circuit QED,” Physical Review Letters, vol. 103, no. 8. American
Physical Society, 2009.
ista: Fink JM, Bianchetti R, Baur M, Göppl M, Steffen L, Filipp S, Leek P, Blais
A, Wallraff A. 2009. Dressed collective qubit states and the Tavis-Cummings model
in circuit QED. Physical Review Letters. 103(8).
mla: Fink, Johannes M., et al. “Dressed Collective Qubit States and the Tavis-Cummings
Model in Circuit QED.” Physical Review Letters, vol. 103, no. 8, American
Physical Society, 2009, doi:10.1103/PhysRevLett.103.083601.
short: J.M. Fink, R. Bianchetti, M. Baur, M. Göppl, L. Steffen, S. Filipp, P. Leek,
A. Blais, A. Wallraff, Physical Review Letters 103 (2009).
date_created: 2018-12-11T11:53:55Z
date_published: 2009-08-17T00:00:00Z
date_updated: 2021-01-12T06:53:05Z
day: '17'
doi: 10.1103/PhysRevLett.103.083601
extern: 1
intvolume: ' 103'
issue: '8'
main_file_link:
- open_access: '1'
url: http://arxiv.org/abs/0812.2651
month: '08'
oa: 1
publication: Physical Review Letters
publication_status: published
publisher: American Physical Society
publist_id: '5350'
quality_controlled: 0
status: public
title: Dressed collective qubit states and the Tavis-Cummings model in circuit QED
type: journal_article
volume: 103
year: '2009'
...
---
_id: '1770'
abstract:
- lang: eng
text: The quantum state of a superconducting qubit nonresonantly coupled to a transmission
line resonator can be determined by measuring the quadrature amplitudes of an
electromagnetic field transmitted through the resonator. We present experiments
in which we analyze in detail the dynamics of the transmitted field as a function
of the measurement frequency for both weak continuous and pulsed measurements.
We find excellent agreement between our data and calculations based on a set of
Bloch-type differential equations for the cavity field derived from the dispersive
Jaynes-Cummings Hamiltonian including dissipation. We show that the measured system
response can be used to construct a measurement operator from which the qubit
population can be inferred accurately. Such a measurement operator can be used
in tomographic methods to reconstruct single and multiqubit states in ensemble-averaged
measurements.
acknowledgement: This work was supported by the SNF Project No. 111899 and ETH Zurich.
A.B. was supported by NSERC, CIFAR, and the Alfred P. Sloan Foundation
author:
- first_name: R
full_name: Bianchetti, R
last_name: Bianchetti
- first_name: Stefan
full_name: Filipp, Stefan
last_name: Filipp
- first_name: Matthias
full_name: Baur, Matthias P
last_name: Baur
- first_name: Johannes M
full_name: Johannes Fink
id: 4B591CBA-F248-11E8-B48F-1D18A9856A87
last_name: Fink
orcid: 0000-0001-8112-028X
- first_name: M
full_name: Göppl, M
last_name: Göppl
- first_name: Peter
full_name: Leek, Peter J
last_name: Leek
- first_name: L.
full_name: Steffen, L. Kraig
last_name: Steffen
- first_name: Alexandre
full_name: Blais, Alexandre
last_name: Blais
- first_name: Andreas
full_name: Wallraff, Andreas
last_name: Wallraff
citation:
ama: Bianchetti R, Filipp S, Baur M, et al. Dynamics of dispersive single-qubit
readout in circuit quantum electrodynamics. Physical Review A - Atomic, Molecular,
and Optical Physics. 2009;80(4). doi:10.1103/PhysRevA.80.043840
apa: Bianchetti, R., Filipp, S., Baur, M., Fink, J. M., Göppl, M., Leek, P., … Wallraff,
A. (2009). Dynamics of dispersive single-qubit readout in circuit quantum electrodynamics.
Physical Review A - Atomic, Molecular, and Optical Physics. American Physical
Society. https://doi.org/10.1103/PhysRevA.80.043840
chicago: Bianchetti, R, Stefan Filipp, Matthias Baur, Johannes M Fink, M Göppl,
Peter Leek, L. Steffen, Alexandre Blais, and Andreas Wallraff. “Dynamics of Dispersive
Single-Qubit Readout in Circuit Quantum Electrodynamics.” Physical Review A
- Atomic, Molecular, and Optical Physics. American Physical Society, 2009.
https://doi.org/10.1103/PhysRevA.80.043840.
ieee: R. Bianchetti et al., “Dynamics of dispersive single-qubit readout
in circuit quantum electrodynamics,” Physical Review A - Atomic, Molecular,
and Optical Physics, vol. 80, no. 4. American Physical Society, 2009.
ista: Bianchetti R, Filipp S, Baur M, Fink JM, Göppl M, Leek P, Steffen L, Blais
A, Wallraff A. 2009. Dynamics of dispersive single-qubit readout in circuit quantum
electrodynamics. Physical Review A - Atomic, Molecular, and Optical Physics. 80(4).
mla: Bianchetti, R., et al. “Dynamics of Dispersive Single-Qubit Readout in Circuit
Quantum Electrodynamics.” Physical Review A - Atomic, Molecular, and Optical
Physics, vol. 80, no. 4, American Physical Society, 2009, doi:10.1103/PhysRevA.80.043840.
short: R. Bianchetti, S. Filipp, M. Baur, J.M. Fink, M. Göppl, P. Leek, L. Steffen,
A. Blais, A. Wallraff, Physical Review A - Atomic, Molecular, and Optical Physics
80 (2009).
date_created: 2018-12-11T11:53:55Z
date_published: 2009-10-30T00:00:00Z
date_updated: 2021-01-12T06:53:05Z
day: '30'
doi: 10.1103/PhysRevA.80.043840
extern: 1
intvolume: ' 80'
issue: '4'
main_file_link:
- open_access: '1'
url: http://arxiv.org/abs/0907.2549
month: '10'
oa: 1
publication: Physical Review A - Atomic, Molecular, and Optical Physics
publication_status: published
publisher: American Physical Society
publist_id: '5349'
quality_controlled: 0
status: public
title: Dynamics of dispersive single-qubit readout in circuit quantum electrodynamics
type: journal_article
volume: 80
year: '2009'
...
---
_id: '1771'
abstract:
- lang: eng
text: The exceptionally strong coupling realizable between superconducting qubits
and photons stored in an on-chip microwave resonator allows for the detailed study
of matter-light interactions in the realm of circuit quantum electrodynamics (QED).
Here we investigate the resonant interaction between a single transmon-type multilevel
artificial atom and weak thermal and coherent fields. We explore up to three photon
dressed states of the coupled system in a linear response heterodyne transmission
measurement. The results are in good quantitative agreement with a generalized
Jaynes-Cummings model. Our data indicate that the role of thermal fields in resonant
cavity QED can be studied in detail using superconducting circuits.
acknowledgement: Nobel Foundation
author:
- first_name: Johannes M
full_name: Johannes Fink
id: 4B591CBA-F248-11E8-B48F-1D18A9856A87
last_name: Fink
orcid: 0000-0001-8112-028X
- first_name: Matthias
full_name: Baur, Matthias P
last_name: Baur
- first_name: R
full_name: Bianchetti, R
last_name: Bianchetti
- first_name: Stefan
full_name: Filipp, Stefan
last_name: Filipp
- first_name: M
full_name: Göppl, M
last_name: Göppl
- first_name: Peter
full_name: Leek, Peter J
last_name: Leek
- first_name: L.
full_name: Steffen, L. Kraig
last_name: Steffen
- first_name: Alexandre
full_name: Blais, Alexandre
last_name: Blais
- first_name: Andreas
full_name: Wallraff, Andreas
last_name: Wallraff
citation:
ama: Fink JM, Baur M, Bianchetti R, et al. Thermal excitation of multi-photon dressed
states in circuit quantum electrodynamics. Physica Scripta T. 2009;T137.
doi:10.1088/0031-8949/2009/T137/014013
apa: Fink, J. M., Baur, M., Bianchetti, R., Filipp, S., Göppl, M., Leek, P., … Wallraff,
A. (2009). Thermal excitation of multi-photon dressed states in circuit quantum
electrodynamics. Physica Scripta T. IOP Publishing Ltd. https://doi.org/10.1088/0031-8949/2009/T137/014013
chicago: Fink, Johannes M, Matthias Baur, R Bianchetti, Stefan Filipp, M Göppl,
Peter Leek, L. Steffen, Alexandre Blais, and Andreas Wallraff. “Thermal Excitation
of Multi-Photon Dressed States in Circuit Quantum Electrodynamics.” Physica
Scripta T. IOP Publishing Ltd., 2009. https://doi.org/10.1088/0031-8949/2009/T137/014013.
ieee: J. M. Fink et al., “Thermal excitation of multi-photon dressed states
in circuit quantum electrodynamics,” Physica Scripta T, vol. T137. IOP
Publishing Ltd., 2009.
ista: Fink JM, Baur M, Bianchetti R, Filipp S, Göppl M, Leek P, Steffen L, Blais
A, Wallraff A. 2009. Thermal excitation of multi-photon dressed states in circuit
quantum electrodynamics. Physica Scripta T. T137.
mla: Fink, Johannes M., et al. “Thermal Excitation of Multi-Photon Dressed States
in Circuit Quantum Electrodynamics.” Physica Scripta T, vol. T137, IOP
Publishing Ltd., 2009, doi:10.1088/0031-8949/2009/T137/014013.
short: J.M. Fink, M. Baur, R. Bianchetti, S. Filipp, M. Göppl, P. Leek, L. Steffen,
A. Blais, A. Wallraff, Physica Scripta T T137 (2009).
date_created: 2018-12-11T11:53:55Z
date_published: 2009-01-01T00:00:00Z
date_updated: 2021-01-12T06:53:06Z
day: '01'
doi: 10.1088/0031-8949/2009/T137/014013
extern: 1
main_file_link:
- open_access: '1'
url: http://arxiv.org/abs/0911.3797
month: '01'
oa: 1
publication: Physica Scripta T
publication_status: published
publisher: IOP Publishing Ltd.
publist_id: '5348'
quality_controlled: 0
status: public
title: Thermal excitation of multi-photon dressed states in circuit quantum electrodynamics
type: journal_article
volume: T137
year: '2009'
...
---
_id: '17719'
abstract:
- lang: eng
text: We propose to use a simple observable, the fractional area of "hot spots"
in weak gravitational lensing mass maps, which are detected with high significance,
to determine background cosmological parameters. Because these high-convergence
regions are directly related to the physical nonlinear structures of the universe,
they derive cosmological information mainly from the nonlinear regime of density
fluctuations. We show that in combination with future cosmic microwave background
anisotropy measurements, this method can place constraints on cosmological parameters
that are comparable to those from the redshift distribution of galaxy cluster
abundances. The main advantage of the statistic proposed in this paper is that
projection effects, normally the main source of uncertainty when determining the
presence and the mass of a galaxy cluster, here serve as a source of information.
article_processing_charge: No
article_type: original
author:
- first_name: Sheng
full_name: Wang, Sheng
last_name: Wang
- first_name: Zoltán
full_name: Haiman, Zoltán
id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36
last_name: Haiman
- first_name: Morgan
full_name: May, Morgan
last_name: May
citation:
ama: Wang S, Haiman Z, May M. Constraining cosmology with high-convergence regions
in weak lensing surveys. The Astrophysical Journal. 2009;691(1):547-559.
doi:10.1088/0004-637x/691/1/547
apa: Wang, S., Haiman, Z., & May, M. (2009). Constraining cosmology with high-convergence
regions in weak lensing surveys. The Astrophysical Journal. American Astronomical
Society. https://doi.org/10.1088/0004-637x/691/1/547
chicago: Wang, Sheng, Zoltán Haiman, and Morgan May. “Constraining Cosmology with
High-Convergence Regions in Weak Lensing Surveys.” The Astrophysical Journal.
American Astronomical Society, 2009. https://doi.org/10.1088/0004-637x/691/1/547.
ieee: S. Wang, Z. Haiman, and M. May, “Constraining cosmology with high-convergence
regions in weak lensing surveys,” The Astrophysical Journal, vol. 691,
no. 1. American Astronomical Society, pp. 547–559, 2009.
ista: Wang S, Haiman Z, May M. 2009. Constraining cosmology with high-convergence
regions in weak lensing surveys. The Astrophysical Journal. 691(1), 547–559.
mla: Wang, Sheng, et al. “Constraining Cosmology with High-Convergence Regions in
Weak Lensing Surveys.” The Astrophysical Journal, vol. 691, no. 1, American
Astronomical Society, 2009, pp. 547–59, doi:10.1088/0004-637x/691/1/547.
short: S. Wang, Z. Haiman, M. May, The Astrophysical Journal 691 (2009) 547–559.
date_created: 2024-09-06T09:03:38Z
date_published: 2009-01-15T00:00:00Z
date_updated: 2024-09-25T13:44:05Z
day: '15'
doi: 10.1088/0004-637x/691/1/547
extern: '1'
intvolume: ' 691'
issue: '1'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1088/0004-637x/691/1/547
month: '01'
oa: 1
oa_version: Published Version
page: 547-559
publication: The Astrophysical Journal
publication_identifier:
issn:
- 0004-637X
- 1538-4357
publication_status: published
publisher: American Astronomical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: Constraining cosmology with high-convergence regions in weak lensing surveys
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 691
year: '2009'
...
---
_id: '17735'
abstract:
- lang: eng
text: 'The supermassive black holes (SMBHs) massive enough to power the bright redshift
~6 quasars observed in the Sloan Digital Sky Survey (SDSS) are thought to have
assembled by mergers and/or gas accretion from less massive "seed" BHs. If the
seeds are the ~100 Msol remnant BHs from the first generation of stars, they must
be in place well before redshift z=6, and must avoid being ejected from their
parent proto-galaxies by the large (few hundred km/s) kicks they suffer from gravitational-radiation
induced recoil during mergers with other BHs. We simulate the SMBH mass function
at redshift z=6 using dark matter (DM) halo merger trees, coupled with a prescription
for the halo occupation fraction, accretion histories, and radial recoil trajectories
of the growing BHs. Our purpose is (i) to map out plausible scenarios for successful
assembly of the z~6 quasar BHs by exploring a wide region of parameter space,
and (ii) to predict the rate of low-frequency gravitational wave events detectable
by the Laser Interferometer Space Antenna (LISA) for each such scenario. Our main
findings are as follows: (1) ~100 Msol seed BHs can grow into the SDSS quasar
BHs without super--Eddington accretion, but only if they form in minihalos by
z~30 and subsequently accrete ~60% of the time; (2) the scenarios with optimistic
assumptions required to explain the SDSS quasar BHs overproduce the mass density
in lower--mass (10^5 to 10^7 Msol) SMBHs by a factor of 100-1000, unless seeds
stop forming, or accrete at a severely diminished rates or duty cycles (e.g. due
to feedback), at z < 20-30. We also present several successful assembly models
and their LISA detection rates, including a "maximal" model that gives the highest
rate (~30/yr at z~6) without overproducing the total SMBH density.'
article_processing_charge: No
article_type: original
author:
- first_name: Takamitsu
full_name: Tanaka, Takamitsu
last_name: Tanaka
- first_name: Zoltán
full_name: Haiman, Zoltán
id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36
last_name: Haiman
citation:
ama: Tanaka T, Haiman Z. The assembly of supermassive black holes at high redshifts.
The Astrophysical Journal. 2009;696(2):1798-1822. doi:10.1088/0004-637x/696/2/1798
apa: Tanaka, T., & Haiman, Z. (2009). The assembly of supermassive black holes
at high redshifts. The Astrophysical Journal. American Astronomical Society.
https://doi.org/10.1088/0004-637x/696/2/1798
chicago: Tanaka, Takamitsu, and Zoltán Haiman. “The Assembly of Supermassive Black
Holes at High Redshifts.” The Astrophysical Journal. American Astronomical
Society, 2009. https://doi.org/10.1088/0004-637x/696/2/1798.
ieee: T. Tanaka and Z. Haiman, “The assembly of supermassive black holes at high
redshifts,” The Astrophysical Journal, vol. 696, no. 2. American Astronomical
Society, pp. 1798–1822, 2009.
ista: Tanaka T, Haiman Z. 2009. The assembly of supermassive black holes at high
redshifts. The Astrophysical Journal. 696(2), 1798–1822.
mla: Tanaka, Takamitsu, and Zoltán Haiman. “The Assembly of Supermassive Black Holes
at High Redshifts.” The Astrophysical Journal, vol. 696, no. 2, American
Astronomical Society, 2009, pp. 1798–822, doi:10.1088/0004-637x/696/2/1798.
short: T. Tanaka, Z. Haiman, The Astrophysical Journal 696 (2009) 1798–1822.
date_created: 2024-09-06T09:19:25Z
date_published: 2009-05-10T00:00:00Z
date_updated: 2024-09-26T13:45:27Z
day: '10'
doi: 10.1088/0004-637x/696/2/1798
extern: '1'
intvolume: ' 696'
issue: '2'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1088/0004-637x/696/2/1798
month: '05'
oa: 1
oa_version: Published Version
page: 1798-1822
publication: The Astrophysical Journal
publication_identifier:
issn:
- 0004-637X
- 1538-4357
publication_status: published
publisher: American Astronomical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: The assembly of supermassive black holes at high redshifts
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 696
year: '2009'
...
---
_id: '17736'
abstract:
- lang: eng
text: 'We discuss currently available observational constraints on the reionization
history of the intergalactic medium (IGM), and the extent to which accreting black
holes (BHs) and stars can help account for these observations. We argue, based
on the combined statistics of Lyman α and β absorption in quasar spectra, that
the IGM contains a significant amount of neutral hydrogen with nH I/nH ≳ 0.1.
On the other hand, we argue, based on the lack of a strong evolution in the observed
abundance of Lyman α emitting galaxies beyond z ∼ 5.5, that the mean neutral hydrogen
fraction cannot exceed nH I/nH ≈ 0.3 at the same redshift. We conclude that the
IGM is experiencing rapid ionization at redshift z ∼ 6. We find that quasar BHs,
including faint ones that are individually below the detection thresholds of existing
optical and X-ray surveys, are unlikely to drive the evolution of the neutral
fraction around this epoch, because they would over-produce the present-day soft
X-ray background. On the other hand, the seeds of the z ∼ 6 quasar BHs likely
appeared at much earlier epochs (z ∼ 20), and produced hard ionizing radiation
by accretion. These early BHs are promising candidates to account for the high
redshift (z ∼ 15) ionization implied by the recent cosmic microwave anisotropy
data from WMAP. Using a model for the growth of BHs by accretion and mergers in
a hierarchical cosmology, we suggest that the early growth of quasars must include
a super-Eddington growth phase, and that, although not yet optically identified,
the FIRST radio survey may have already detected several thousand > 10^8 M⊙ BHs
at z > 6. '
article_processing_charge: No
author:
- first_name: Zoltán
full_name: Haiman, Zoltán
id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36
last_name: Haiman
citation:
ama: 'Haiman Z. Probing the reionization history of the Universe. In: Livio M, Casertano
S, eds. Planets to Cosmology. Essential Science in the Final Years of the Hubble
Space Telescope. Vol 18. Space Telescope Science Institute Symposium Series.
Baltimore: Cambridge University Press; 2009:157-173. doi:10.1017/cbo9780511536328.014'
apa: 'Haiman, Z. (2009). Probing the reionization history of the Universe. In M.
Livio & S. Casertano (Eds.), Planets to Cosmology. Essential Science in
the Final Years of the Hubble Space Telescope (Vol. 18, pp. 157–173). Baltimore:
Cambridge University Press. https://doi.org/10.1017/cbo9780511536328.014'
chicago: 'Haiman, Zoltán. “Probing the Reionization History of the Universe.” In
Planets to Cosmology. Essential Science in the Final Years of the Hubble Space
Telescope, edited by Mario Livio and Stefano Casertano, 18:157–73. Space
Telescope Science Institute Symposium Series. Baltimore: Cambridge University
Press, 2009. https://doi.org/10.1017/cbo9780511536328.014.'
ieee: 'Z. Haiman, “Probing the reionization history of the Universe,” in Planets
to Cosmology. Essential Science in the Final Years of the Hubble Space Telescope,
vol. 18, M. Livio and S. Casertano, Eds. Baltimore: Cambridge University Press,
2009, pp. 157–173.'
ista: 'Haiman Z. 2009.Probing the reionization history of the Universe. In: Planets
to Cosmology. Essential Science in the Final Years of the Hubble Space Telescope.
vol. 18, 157–173.'
mla: Haiman, Zoltán. “Probing the Reionization History of the Universe.” Planets
to Cosmology. Essential Science in the Final Years of the Hubble Space Telescope,
edited by Mario Livio and Stefano Casertano, vol. 18, Cambridge University Press,
2009, pp. 157–73, doi:10.1017/cbo9780511536328.014.
short: Z. Haiman, in:, M. Livio, S. Casertano (Eds.), Planets to Cosmology. Essential
Science in the Final Years of the Hubble Space Telescope, Cambridge University
Press, Baltimore, 2009, pp. 157–173.
conference:
end_date: 2004-05-06
location: Baltimore, MD, United States
name: Proceedings of the Space Telescope Science Institute Symposium
start_date: 2004-05-03
date_created: 2024-09-06T09:20:03Z
date_published: 2009-08-17T00:00:00Z
date_updated: 2024-09-30T07:02:44Z
day: '17'
doi: 10.1017/cbo9780511536328.014
editor:
- first_name: Mario
full_name: Livio, Mario
last_name: Livio
- first_name: Stefano
full_name: Casertano, Stefano
last_name: Casertano
extern: '1'
intvolume: ' 18'
language:
- iso: eng
main_file_link:
- url: https://doi.org/10.1017/CBO9780511536328.014
month: '08'
oa_version: None
page: 157-173
place: Baltimore
publication: Planets to Cosmology. Essential Science in the Final Years of the Hubble
Space Telescope
publication_identifier:
eisbn:
- '9780511536328'
isbn:
- '9780521847582'
publication_status: published
publisher: Cambridge University Press
quality_controlled: '1'
scopus_import: '1'
series_title: ' Space Telescope Science Institute Symposium Series'
status: public
title: Probing the reionization history of the Universe
type: book_chapter
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 18
year: '2009'
...
---
_id: '17764'
abstract:
- lang: eng
text: Supermassive black hole binaries (SMBHBs) with masses in the mass range ∼(10^4–10^7) M⊙/(1
+ z), produced in galaxy mergers, are thought to complete their coalescence due
to the emission of gravitational waves (GWs). The anticipated detection of the
GWs by the future Laser Interferometric Space Antenna (LISA) will constitute a
milestone for fundamental physics and astrophysics. While the GW signatures themselves
will provide a treasure trove of information, if the source can be securely identified
in electromagnetic (EM) bands, this would open up entirely new scientific opportunities,
to probe fundamental physics, astrophysics and cosmology. We discuss several ideas,
involving wide-field telescopes, that may be useful in locating electromagnetic
counterparts to SMBHBs detected by LISA. In particular, the binary may produce
a variable electromagnetic flux, such as a roughly periodic signal due to the
orbital motion prior to coalescence, or a prompt transient signal caused by shocks
in the circumbinary disc when the SMBHB recoils and 'shakes' the disc. We discuss
whether these time-variable EM signatures may be detectable, and how they can
help in identifying a unique counterpart within the localization errors provided
by LISA. We also discuss a possibility of identifying a population of coalescing
SMBHBs statistically, in a deep optical survey for periodically variable sources,
before LISA detects the GWs directly. The discovery of such sources would confirm
that gas is present in the vicinity and is being perturbed by the SMBHB—serving
as a proof of concept for eventually finding actual LISA counterparts.
article_number: '094032'
article_processing_charge: No
article_type: original
author:
- first_name: Zoltán
full_name: Haiman, Zoltán
id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36
last_name: Haiman
- first_name: Bence
full_name: Kocsis, Bence
last_name: Kocsis
- first_name: Kristen
full_name: Menou, Kristen
last_name: Menou
- first_name: Zoltán
full_name: Lippai, Zoltán
last_name: Lippai
- first_name: Zsolt
full_name: Frei, Zsolt
last_name: Frei
citation:
ama: Haiman Z, Kocsis B, Menou K, Lippai Z, Frei Z. Identifying decaying supermassive
black hole binaries from their variable electromagnetic emission. Classical
and Quantum Gravity. 2009;26(9). doi:10.1088/0264-9381/26/9/094032
apa: Haiman, Z., Kocsis, B., Menou, K., Lippai, Z., & Frei, Z. (2009). Identifying
decaying supermassive black hole binaries from their variable electromagnetic
emission. Classical and Quantum Gravity. IOP Publishing. https://doi.org/10.1088/0264-9381/26/9/094032
chicago: Haiman, Zoltán, Bence Kocsis, Kristen Menou, Zoltán Lippai, and Zsolt Frei.
“Identifying Decaying Supermassive Black Hole Binaries from Their Variable Electromagnetic
Emission.” Classical and Quantum Gravity. IOP Publishing, 2009. https://doi.org/10.1088/0264-9381/26/9/094032.
ieee: Z. Haiman, B. Kocsis, K. Menou, Z. Lippai, and Z. Frei, “Identifying decaying
supermassive black hole binaries from their variable electromagnetic emission,”
Classical and Quantum Gravity, vol. 26, no. 9. IOP Publishing, 2009.
ista: Haiman Z, Kocsis B, Menou K, Lippai Z, Frei Z. 2009. Identifying decaying
supermassive black hole binaries from their variable electromagnetic emission.
Classical and Quantum Gravity. 26(9), 094032.
mla: Haiman, Zoltán, et al. “Identifying Decaying Supermassive Black Hole Binaries
from Their Variable Electromagnetic Emission.” Classical and Quantum Gravity,
vol. 26, no. 9, 094032, IOP Publishing, 2009, doi:10.1088/0264-9381/26/9/094032.
short: Z. Haiman, B. Kocsis, K. Menou, Z. Lippai, Z. Frei, Classical and Quantum
Gravity 26 (2009).
date_created: 2024-09-06T09:51:19Z
date_published: 2009-05-07T00:00:00Z
date_updated: 2024-09-30T09:19:04Z
day: '07'
doi: 10.1088/0264-9381/26/9/094032
extern: '1'
intvolume: ' 26'
issue: '9'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1088/0264-9381/26/9/094032
month: '05'
oa: 1
oa_version: Published Version
publication: Classical and Quantum Gravity
publication_identifier:
issn:
- 0264-9381
- 1361-6382
publication_status: published
publisher: IOP Publishing
quality_controlled: '1'
scopus_import: '1'
status: public
title: Identifying decaying supermassive black hole binaries from their variable electromagnetic
emission
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 26
year: '2009'
...
---
_id: '17765'
abstract:
- lang: eng
text: 'Scaling relations among galaxy cluster observables, which will become available
in large future samples of galaxy clusters, could be used to constrain not only
cluster structure, but also cosmology. We study the utility of this approach,
employing a physically motivated parametric model to describe cluster structure
and applying it to the expected relation between the Sunyaev–Zel''dovich decrement
(Sν) and the emission-weighted X-ray temperature (Tew). The slope and normalization
of the entropy profile, the concentration of the dark matter potential, the pressure
at the virial radius and the level of non-thermal pressure support as well as
the mass and redshift dependence of these quantities are described by free parameters.
With a suitable choice of fiducial parameter values, the cluster model satisfies
several existing observational constraints. We employ a Fisher matrix approach
to estimate the joint errors on cosmological and cluster structure parameters
from a measurement of Sν versus Tew in a future survey. We find that different
cosmological parameters affect the scaling relation differently: predominantly
through the baryon fraction (Ωm and Ωb), the virial overdensity (w0 and wa for
low-z clusters) and the angular diameter distance (w0 and wa for high-z clusters;
ΩDE and h). We find that the cosmology constraints from the scaling relation are
comparable to those expected from the number counts (dN/dz) of the same clusters.
The scaling-relation approach is relatively insensitive to selection effects and
it offers a valuable consistency check; combining the information from the scaling
relation and dN/dz is also useful to break parameter degeneracies and help disentangle
cluster physics from cosmology. Our work suggests that scaling relations should
be a useful component in extracting cosmological information from large future
cluster surveys.'
article_processing_charge: No
article_type: original
author:
- first_name: Cien
full_name: Shang, Cien
last_name: Shang
- first_name: Zoltán
full_name: Haiman, Zoltán
id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36
last_name: Haiman
- first_name: Licia
full_name: Verde, Licia
last_name: Verde
citation:
ama: Shang C, Haiman Z, Verde L. Probing cosmology and galaxy cluster structure
with the Sunyaev-Zel’dovich decrement versus X-ray temperature scaling relation.
Monthly Notices of the Royal Astronomical Society. 2009;400(2):1085-1104.
doi:10.1111/j.1365-2966.2009.15527.x
apa: Shang, C., Haiman, Z., & Verde, L. (2009). Probing cosmology and galaxy
cluster structure with the Sunyaev-Zel’dovich decrement versus X-ray temperature
scaling relation. Monthly Notices of the Royal Astronomical Society. Oxford
University Press. https://doi.org/10.1111/j.1365-2966.2009.15527.x
chicago: Shang, Cien, Zoltán Haiman, and Licia Verde. “Probing Cosmology and Galaxy
Cluster Structure with the Sunyaev-Zel’dovich Decrement versus X-Ray Temperature
Scaling Relation.” Monthly Notices of the Royal Astronomical Society. Oxford
University Press, 2009. https://doi.org/10.1111/j.1365-2966.2009.15527.x.
ieee: C. Shang, Z. Haiman, and L. Verde, “Probing cosmology and galaxy cluster structure
with the Sunyaev-Zel’dovich decrement versus X-ray temperature scaling relation,”
Monthly Notices of the Royal Astronomical Society, vol. 400, no. 2. Oxford
University Press, pp. 1085–1104, 2009.
ista: Shang C, Haiman Z, Verde L. 2009. Probing cosmology and galaxy cluster structure
with the Sunyaev-Zel’dovich decrement versus X-ray temperature scaling relation.
Monthly Notices of the Royal Astronomical Society. 400(2), 1085–1104.
mla: Shang, Cien, et al. “Probing Cosmology and Galaxy Cluster Structure with the
Sunyaev-Zel’dovich Decrement versus X-Ray Temperature Scaling Relation.” Monthly
Notices of the Royal Astronomical Society, vol. 400, no. 2, Oxford University
Press, 2009, pp. 1085–104, doi:10.1111/j.1365-2966.2009.15527.x.
short: C. Shang, Z. Haiman, L. Verde, Monthly Notices of the Royal Astronomical
Society 400 (2009) 1085–1104.
date_created: 2024-09-06T09:51:57Z
date_published: 2009-11-12T00:00:00Z
date_updated: 2024-09-30T09:24:18Z
day: '12'
doi: 10.1111/j.1365-2966.2009.15527.x
extern: '1'
intvolume: ' 400'
issue: '2'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1111/j.1365-2966.2009.15527.x
month: '11'
oa: 1
oa_version: Published Version
page: 1085-1104
publication: Monthly Notices of the Royal Astronomical Society
publication_identifier:
issn:
- 0035-8711
- 1365-2966
publication_status: published
publisher: Oxford University Press
quality_controlled: '1'
scopus_import: '1'
status: public
title: Probing cosmology and galaxy cluster structure with the Sunyaev-Zel'dovich
decrement versus X-ray temperature scaling relation
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 400
year: '2009'
...
---
_id: '17769'
abstract:
- lang: eng
text: Arguably the best hope of understanding the tail end of the re-ionization
of the intergalactic medium (IGM) at redshift z > 6 is through the detection and
characterization of the Gunn–Peterson damping wing absorption of the IGM in bright
quasar spectra. However, the use of quasar spectra to measure the IGM damping
wing requires a model of the quasar's intrinsic Lyman α emission line. Here we
quantify the uncertainties in the intrinsic line shapes, and how those uncertainties
affect the determination of the IGM neutral fraction. We have assembled a catalogue
of high-resolution Hubble Space Telescope spectra of the emission lines of unobscured
low-redshift quasars, and have characterized the variance in the shapes of their
lines. We then add simulated absorption from the high-redshift IGM to these quasar
spectra in order to determine the corresponding uncertainties in re-ionization
constraints using current and future samples of z > 6 quasar spectra. We find
that, if the redshift of the Lyman α emission line is presumed to coincide with
the systemic redshift determined from metal lines, the inferred IGM neutral fraction
is systematically biased to low values due to a systematic blueshift of the Lyman
α line relative to the metal lines. If a similar blueshift persists in quasars
at z > 6, this bias strengthens previous claims of a significant neutral hydrogen
fraction at z≈ 6. The bias can be reduced by including a Lyman α blueshift in
the modelling procedure, or by excising wavelengths near the Lyman α line centre
from the modelling. Intrinsic Lyman α line shape variations still induce significant
scatter in the inferred xIGM values. Nevertheless, this scatter still allows a
robust distinction between a highly ionized (xIGM∼ 10−3) and a neutral (xIGM=
1) IGM with even a few bright quasars. We conclude that if the variations of the
intrinsic Lyman α emission line shapes in high-z quasars are similar to those
at low-z, this variation will not limit the usefulness of quasar spectra in probing
re-ionization.
article_processing_charge: No
article_type: original
author:
- first_name: R. H.
full_name: Kramer, R. H.
last_name: Kramer
- first_name: Zoltán
full_name: Haiman, Zoltán
id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36
last_name: Haiman
citation:
ama: 'Kramer RH, Haiman Z. Probing re-ionization with quasar spectra: The impact
of the intrinsic Lyman α emission line shape uncertainty. Monthly Notices of
the Royal Astronomical Society. 2009;400(3):1493-1511. doi:10.1111/j.1365-2966.2009.15552.x'
apa: 'Kramer, R. H., & Haiman, Z. (2009). Probing re-ionization with quasar
spectra: The impact of the intrinsic Lyman α emission line shape uncertainty.
Monthly Notices of the Royal Astronomical Society. Oxford University Press.
https://doi.org/10.1111/j.1365-2966.2009.15552.x'
chicago: 'Kramer, R. H., and Zoltán Haiman. “Probing Re-Ionization with Quasar Spectra:
The Impact of the Intrinsic Lyman α Emission Line Shape Uncertainty.” Monthly
Notices of the Royal Astronomical Society. Oxford University Press, 2009.
https://doi.org/10.1111/j.1365-2966.2009.15552.x.'
ieee: 'R. H. Kramer and Z. Haiman, “Probing re-ionization with quasar spectra: The
impact of the intrinsic Lyman α emission line shape uncertainty,” Monthly Notices
of the Royal Astronomical Society, vol. 400, no. 3. Oxford University Press,
pp. 1493–1511, 2009.'
ista: 'Kramer RH, Haiman Z. 2009. Probing re-ionization with quasar spectra: The
impact of the intrinsic Lyman α emission line shape uncertainty. Monthly Notices
of the Royal Astronomical Society. 400(3), 1493–1511.'
mla: 'Kramer, R. H., and Zoltán Haiman. “Probing Re-Ionization with Quasar Spectra:
The Impact of the Intrinsic Lyman α Emission Line Shape Uncertainty.” Monthly
Notices of the Royal Astronomical Society, vol. 400, no. 3, Oxford University
Press, 2009, pp. 1493–511, doi:10.1111/j.1365-2966.2009.15552.x.'
short: R.H. Kramer, Z. Haiman, Monthly Notices of the Royal Astronomical Society
400 (2009) 1493–1511.
date_created: 2024-09-06T09:58:12Z
date_published: 2009-12-02T00:00:00Z
date_updated: 2024-09-30T09:48:06Z
day: '02'
doi: 10.1111/j.1365-2966.2009.15552.x
extern: '1'
intvolume: ' 400'
issue: '3'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1111/j.1365-2966.2009.15552.x
month: '12'
oa: 1
oa_version: Published Version
page: 1493-1511
publication: Monthly Notices of the Royal Astronomical Society
publication_identifier:
issn:
- 0035-8711
- 1365-2966
publication_status: published
publisher: Oxford University Press
quality_controlled: '1'
scopus_import: '1'
status: public
title: 'Probing re-ionization with quasar spectra: The impact of the intrinsic Lyman
α emission line shape uncertainty'
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 400
year: '2009'
...