---
OA_embargo: '6'
OA_place: publisher
_id: '20798'
abstract:
- lang: eng
text: "Atom interferometers measure the relative phase shifts between coherent matter-wave
paths\r\nthat arise from interactions with external fields or inertial forces.
Due to their exceptional\r\nphase sensitivity, atom interferometers became an
essential tool for precision measurements\r\nand fundamental physics experiments,
finding applications in geodesy, gravimetry, and inertial\r\nnavigation. However,
their measurement precision is limited by quantum projection noise,\r\nwhich arises
from the Heisenberg uncertainty principle, preventing the measurement of atomic\r\nstates
with absolute precision. The generation of entanglement between the atoms offers
a\r\npath to surpass this so-called standard quantum limit, thereby enhancing
the interferometer’s\r\nphase sensitivity beyond classical measurement bounds.\r\nThis
thesis reports on the development of an atom interferometer experiment designed
to\r\nrealize cavity-mediated, squeezed Mach-Zehnder-type interferometry with
ultra-cold 87Rb atoms.\r\nThe experiment combines cavity-aided spin-squeezing
with cavity-mediated Mach-Zehnder\r\ninterferometry to demonstrate entanglement-enhanced
phase sensitivity. The experiment is\r\ncentered on a triangular optical cavity
that mediates all relevant atom-light interactions. The\r\ncavity provides optical
trapping, spin-squeezing, and Raman beam-splitter operations, enabling\r\nto perform
interferometry on a continuously trapped atomic ensemble.\r\nThe thesis elaborates
on the fundamental theoretical framework, the cavity design, and the full\r\noptical
setup, including the detailed configuration of the developed laser stabilization
methods.\r\nExperimentally, continuous loading methods were explored, resulting
in an accumulation of\r\nup to 4 × 106\r\natoms in the dipole trap within a cycle
time of 500 ms. The AC Stark shift\r\ncompensation method developed for continuous
loading was further applied for in-trap cooling\r\nto 10 µK, and optical pumping
for efficient atomic state preparation. Coherent state control\r\nwas verified
via observation of microwave-driven Rabi oscillations, and used to characterize\r\natom-cavity
coupling.\r\nThese presented results establish the experimental groundwork for
the future development of\r\ncavity-mediated, entanglement-enhanced Mach-Zehnder-type
atom interferometry."
alternative_title:
- ISTA Thesis
article_processing_charge: No
author:
- first_name: Sebastian
full_name: Wald, Sebastian
id: 133F200A-B015-11E9-AD41-0EDAE5697425
last_name: Wald
orcid: 0000-0002-5869-1604
citation:
ama: Wald S. Atoms in a propagating-wave cavity for squeezed Mach-Zehnder atom interferometry.
2025. doi:10.15479/AT-ISTA-20798
apa: Wald, S. (2025). Atoms in a propagating-wave cavity for squeezed Mach-Zehnder
atom interferometry. Institute of Science and Technology Austria. https://doi.org/10.15479/AT-ISTA-20798
chicago: Wald, Sebastian. “Atoms in a Propagating-Wave Cavity for Squeezed Mach-Zehnder
Atom Interferometry.” Institute of Science and Technology Austria, 2025. https://doi.org/10.15479/AT-ISTA-20798.
ieee: S. Wald, “Atoms in a propagating-wave cavity for squeezed Mach-Zehnder atom
interferometry,” Institute of Science and Technology Austria, 2025.
ista: Wald S. 2025. Atoms in a propagating-wave cavity for squeezed Mach-Zehnder
atom interferometry. Institute of Science and Technology Austria.
mla: Wald, Sebastian. Atoms in a Propagating-Wave Cavity for Squeezed Mach-Zehnder
Atom Interferometry. Institute of Science and Technology Austria, 2025, doi:10.15479/AT-ISTA-20798.
short: S. Wald, Atoms in a Propagating-Wave Cavity for Squeezed Mach-Zehnder Atom
Interferometry, Institute of Science and Technology Austria, 2025.
corr_author: '1'
das_tickbox: '1'
date_created: 2025-12-11T11:48:11Z
date_published: 2025-12-11T00:00:00Z
date_updated: 2026-07-24T08:07:28Z
day: '11'
ddc:
- '530'
degree_awarded: PhD
department:
- _id: GradSch
- _id: OnHo
doi: 10.15479/AT-ISTA-20798
doi_confirm: '1'
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date_updated: 2026-06-15T22:30:03Z
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fulldoi: https://doi.org/10.15479/AT-ISTA-20798
has_accepted_license: '1'
keyword:
- entanglement-enhanced atom interferometry
- cavity QED
- spin-squeezing
- dipole trap
- quantum optics
language:
- iso: eng
month: '12'
oa: 1
oa_version: Published Version
page: '152'
publication_identifier:
isbn:
- 978-3-99078-075-6
issn:
- 2663-337X
publication_status: published
publisher: Institute of Science and Technology Austria
related_material:
record:
- id: '14759'
relation: part_of_dissertation
status: public
status: public
supervisor:
- first_name: Onur
full_name: Hosten, Onur
id: 4C02D85E-F248-11E8-B48F-1D18A9856A87
last_name: Hosten
orcid: 0000-0002-2031-204X
title: Atoms in a propagating-wave cavity for squeezed Mach-Zehnder atom interferometry
tmp:
image: /images/cc_by_nc.png
legal_code_url: https://creativecommons.org/licenses/by-nc/4.0/legalcode
name: Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC 4.0)
short: CC BY-NC (4.0)
type: dissertation
user_id: 8b945eb4-e2f2-11eb-945a-df72226e66a9
year: '2025'
...
---
_id: '12497'
abstract:
- lang: eng
text: Aromatic side chains are important reporters of the plasticity of proteins,
and often form important contacts in protein–protein interactions. We studied
aromatic residues in the two structurally homologous cross-β amyloid fibrils HET-s,
and HELLF by employing a specific isotope-labeling approach and magic-angle-spinning
NMR. The dynamic behavior of the aromatic residues Phe and Tyr indicates that
the hydrophobic amyloid core is rigid, without any sign of "breathing motions"
over hundreds of milliseconds at least. Aromatic residues exposed at the fibril
surface have a rigid ring axis but undergo ring flips on a variety of time scales
from nanoseconds to microseconds. Our approach provides direct insight into hydrophobic-core
motions, enabling a better evaluation of the conformational heterogeneity generated
from an NMR structural ensemble of such amyloid cross-β architecture.
article_processing_charge: No
author:
- first_name: Lea Marie
full_name: Becker, Lea Marie
id: 36336939-eb97-11eb-a6c2-c83f1214ca79
last_name: Becker
orcid: 0000-0002-6401-5151
- first_name: Paul
full_name: Schanda, Paul
id: 7B541462-FAF6-11E9-A490-E8DFE5697425
last_name: Schanda
orcid: 0000-0002-9350-7606
citation:
ama: 'Becker LM, Schanda P. Research data to: The rigid core and flexible surface
of amyloid fibrils probed by magic-angle-spinning NMR spectroscopy of aromatic
residues. 2023. doi:10.15479/AT:ISTA:12497'
apa: 'Becker, L. M., & Schanda, P. (2023). Research data to: The rigid core
and flexible surface of amyloid fibrils probed by magic-angle-spinning NMR spectroscopy
of aromatic residues. Institute of Science and Technology Austria. https://doi.org/10.15479/AT:ISTA:12497'
chicago: 'Becker, Lea Marie, and Paul Schanda. “Research Data to: The Rigid Core
and Flexible Surface of Amyloid Fibrils Probed by Magic-Angle-Spinning NMR Spectroscopy
of Aromatic Residues.” Institute of Science and Technology Austria, 2023. https://doi.org/10.15479/AT:ISTA:12497.'
ieee: 'L. M. Becker and P. Schanda, “Research data to: The rigid core and flexible
surface of amyloid fibrils probed by magic-angle-spinning NMR spectroscopy of
aromatic residues.” Institute of Science and Technology Austria, 2023.'
ista: 'Becker LM, Schanda P. 2023. Research data to: The rigid core and flexible
surface of amyloid fibrils probed by magic-angle-spinning NMR spectroscopy of
aromatic residues, Institute of Science and Technology Austria, 10.15479/AT:ISTA:12497.'
mla: 'Becker, Lea Marie, and Paul Schanda. Research Data to: The Rigid Core and
Flexible Surface of Amyloid Fibrils Probed by Magic-Angle-Spinning NMR Spectroscopy
of Aromatic Residues. Institute of Science and Technology Austria, 2023, doi:10.15479/AT:ISTA:12497.'
short: L.M. Becker, P. Schanda, (2023).
contributor:
- contributor_type: researcher
first_name: Mélanie
last_name: Berbon
- contributor_type: researcher
first_name: Alicia
last_name: Vallet
- contributor_type: researcher
first_name: Axelle
last_name: Grelard
- contributor_type: researcher
first_name: Estelle
last_name: Morvan
- contributor_type: researcher
first_name: Benjamin
last_name: Bardiaux
- contributor_type: researcher
first_name: Roman
last_name: Lichtenecker
- contributor_type: researcher
first_name: Matthias
last_name: Ernst
- contributor_type: researcher
first_name: Antoine
last_name: Loquet
- contributor_type: contact_person
first_name: Paul
id: 7B541462-FAF6-11E9-A490-E8DFE5697425
last_name: Schanda
orcid: 0000-0002-9350-7606
- contributor_type: researcher
first_name: Lea Marie
id: 36336939-eb97-11eb-a6c2-c83f1214ca79
last_name: Becker
orcid: 0000-0002-6401-5151
corr_author: '1'
date_created: 2023-02-03T08:08:02Z
date_published: 2023-03-23T00:00:00Z
date_updated: 2024-10-21T06:01:38Z
day: '23'
ddc:
- '572'
department:
- _id: GradSch
- _id: PaSc
doi: 10.15479/AT:ISTA:12497
file:
- access_level: open_access
checksum: fd9a28620a81a82991fb70f4fd6591d9
content_type: application/zip
creator: lbecker
date_created: 2023-03-23T10:03:16Z
date_updated: 2023-03-24T09:34:20Z
file_id: '12743'
file_name: Research_Data.zip
file_size: 87018103
relation: main_file
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checksum: 30ebdfb600af118fcf8518b6efe0b7e9
content_type: text/plain
creator: dernst
date_created: 2023-03-24T07:13:55Z
date_updated: 2023-03-24T09:42:03Z
file_id: '12755'
file_name: README.txt
file_size: 747
relation: main_file
file_date_updated: 2023-03-24T09:42:03Z
fulldoi: https://doi.org/10.15479/AT:ISTA:12497
has_accepted_license: '1'
keyword:
- aromatic side chains
- isotopic labeling
- protein dynamics
- ring flips
- spin relaxation
month: '03'
oa: 1
oa_version: Published Version
publisher: Institute of Science and Technology Austria
related_material:
record:
- id: '12675'
relation: used_in_publication
status: public
status: public
title: 'Research data to: The rigid core and flexible surface of amyloid fibrils probed
by magic-angle-spinning NMR spectroscopy of aromatic residues'
tmp:
image: /images/cc_by_nc.png
legal_code_url: https://creativecommons.org/licenses/by-nc/4.0/legalcode
name: Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC 4.0)
short: CC BY-NC (4.0)
type: research_data
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
year: '2023'
...