@article{287,
  abstract     = {In this paper, we discuss biological effects of electromagnetic (EM) fields in the context of cancer biology. In particular, we review the nanomechanical properties of microtubules (MTs), the latter being one of the most successful targets for cancer therapy. We propose an investigation on the coupling of electromagnetic radiation to mechanical vibrations of MTs as an important basis for biological and medical applications. In our opinion, optomechanical methods can accurately monitor and control the mechanical properties of isolated MTs in a liquid environment. Consequently, studying nanomechanical properties of MTs may give useful information for future applications to diagnostic and therapeutic technologies involving non-invasive externally applied physical fields. For example, electromagnetic fields or high intensity ultrasound can be used therapeutically avoiding harmful side effects of chemotherapeutic agents or classical radiation therapy.},
  author       = {Salari, Vahid and Barzanjeh, Shabir and Cifra, Michal and Simon, Christoph and Scholkmann, Felix and Alirezaei, Zahra and Tuszynski, Jack},
  journal      = {Frontiers in Bioscience - Landmark},
  number       = {8},
  pages        = {1391 -- 1406},
  publisher    = {Frontiers in Bioscience},
  title        = {{Electromagnetic fields and optomechanics In cancer diagnostics and treatment}},
  doi          = {10.2741/4651},
  volume       = {23},
  year         = {2018},
}

@inproceedings{155,
  abstract     = {There is currently significant interest in operating devices in the quantum regime, where their behaviour cannot be explained through classical mechanics. Quantum states, including entangled states, are fragile and easily disturbed by excessive thermal noise. Here we address the question of whether it is possible to create non-reciprocal devices that encourage the flow of thermal noise towards or away from a particular quantum device in a network. Our work makes use of the cascaded systems formalism to answer this question in the affirmative, showing how a three-port device can be used as an effective thermal transistor, and illustrates how this formalism maps onto an experimentally-realisable optomechanical system. Our results pave the way to more resilient quantum devices and to the use of thermal noise as a resource.},
  author       = {Xuereb, André and Aquilina, Matteo and Barzanjeh, Shabir},
  editor       = {Andrews, D L and Ostendorf, A and Bain, A J and Nunzi, J M},
  location     = {Strasbourg, France},
  publisher    = {SPIE},
  title        = {{Routing thermal noise through quantum networks}},
  doi          = {10.1117/12.2309928},
  volume       = {10672},
  year         = {2018},
}

@article{436,
  abstract     = {There has been significant interest recently in using complex quantum systems to create effective nonreciprocal dynamics. Proposals have been put forward for the realization of artificial magnetic fields for photons and phonons; experimental progress is fast making these proposals a reality. Much work has concentrated on the use of such systems for controlling the flow of signals, e.g., to create isolators or directional amplifiers for optical signals. In this Letter, we build on this work but move in a different direction. We develop the theory of and discuss a potential realization for the controllable flow of thermal noise in quantum systems. We demonstrate theoretically that the unidirectional flow of thermal noise is possible within quantum cascaded systems. Viewing an optomechanical platform as a cascaded system we show here that one can ultimately control the direction of the flow of thermal noise. By appropriately engineering the mechanical resonator, which acts as an artificial reservoir, the flow of thermal noise can be constrained to a desired direction, yielding a thermal rectifier. The proposed quantum thermal noise rectifier could potentially be used to develop devices such as a thermal modulator, a thermal router, and a thermal amplifier for nanoelectronic devices and superconducting circuits.},
  author       = {Barzanjeh, Shabir and Aquilina, Matteo and Xuereb, André},
  journal      = {Physical Review Letters},
  number       = {6},
  publisher    = {American Physical Society},
  title        = {{Manipulating the flow of thermal noise in quantum devices}},
  doi          = {10.1103/PhysRevLett.120.060601},
  volume       = {120},
  year         = {2018},
}

@article{22,
  abstract     = {Conventional ultra-high sensitivity detectors in the millimeter-wave range are usually cooled as their own thermal noise at room temperature would mask the weak received radiation. The need for cryogenic systems increases the cost and complexity of the instruments, hindering the development of, among others, airborne and space applications. In this work, the nonlinear parametric upconversion of millimeter-wave radiation to the optical domain inside high-quality (Q) lithium niobate whispering-gallery mode (WGM) resonators is proposed for ultra-low noise detection. We experimentally demonstrate coherent upconversion of millimeter-wave signals to a 1550 nm telecom carrier, with a photon conversion efficiency surpassing the state-of-the-art by 2 orders of magnitude. Moreover, a theoretical model shows that the thermal equilibrium of counterpropagating WGMs is broken by overcoupling the millimeter-wave WGM, effectively cooling the upconverted mode and allowing ultra-low noise detection. By theoretically estimating the sensitivity of a correlation radiometer based on the presented scheme, it is found that room-temperature radiometers with better sensitivity than state-of-the-art high-electron-mobility transistor (HEMT)-based radiometers can be designed. This detection paradigm can be used to develop room-temperature instrumentation for radio astronomy, earth observation, planetary missions, and imaging systems.},
  author       = {Botello, Gabriel and Sedlmeir, Florian and Rueda Sanchez, Alfredo R and Abdalmalak, Kerlos and Brown, Elliott and Leuchs, Gerd and Preu, Sascha and Segovia Vargas, Daniel and Strekalov, Dmitry and Munoz, Luis and Schwefel, Harald},
  issn         = {2334-2536},
  journal      = {Optica},
  number       = {10},
  pages        = {1210--1219},
  publisher    = {Optica Publishing Group},
  title        = {{Sensitivity limits of millimeter-wave photonic radiometers based on efficient electro-optic upconverters}},
  doi          = {10.1364/OPTICA.5.001210},
  volume       = {5},
  year         = {2018},
}

@article{307,
  abstract     = {Spontaneous emission spectra of two initially excited closely spaced identical atoms are very sensitive to the strength and the direction of the applied magnetic field. We consider the relevant schemes that ensure the determination of the mutual spatial orientation of the atoms and the distance between them by entirely optical means. A corresponding theoretical description is given accounting for the dipole-dipole interaction between the two atoms in the presence of a magnetic field and for polarizations of the quantum field interacting with magnetic sublevels of the two-atom system. },
  author       = {Redchenko, Elena and Makarov, Alexander and Yudson, Vladimir},
  journal      = {Physical Review A},
  number       = {4},
  publisher    = {American Physical Society},
  title        = {{Nanoscopy of pairs of atoms by fluorescence in a magnetic field}},
  doi          = {10.1103/PhysRevA.97.043812},
  volume       = {97},
  year         = {2018},
}

@article{1114,
  abstract     = {Nonequilibrium phase transitions exist in damped-driven open quantum systems when the continuous tuning of an external parameter leads to a transition between two robust steady states. In second-order transitions this change is abrupt at a critical point, whereas in first-order transitions the two phases can coexist in a critical hysteresis domain. Here, we report the observation of a first-order dissipative quantum phase transition in a driven circuit quantum electrodynamics system. It takes place when the photon blockade of the driven cavity-atom system is broken by increasing the drive power. The observed experimental signature is a bimodal phase space distribution with varying weights controlled by the drive strength. Our measurements show an improved stabilization of the classical attractors up to the millisecond range when the size of the quantum system is increased from one to three artificial atoms. The formation of such robust pointer states could be used for new quantum measurement schemes or to investigate multiphoton phases of finite-size, nonlinear, open quantum systems.},
  author       = {Fink, Johannes M and Dombi, András and Vukics, András and Wallraff, Andreas and Domokos, Peter},
  issn         = {2160-3308},
  journal      = {Physical Review X},
  number       = {1},
  publisher    = {American Physical Society},
  title        = {{Observation of the photon blockade breakdown phase transition}},
  doi          = {10.1103/PhysRevX.7.011012},
  volume       = {7},
  year         = {2017},
}

@inproceedings{485,
  abstract     = {We present results on nonlinear electro-optical conversion of microwave radiation into the optical telecommunication band with more than 0.1% photon number conversion efficiency with MHz bandwidth, in a crystalline whispering gallery mode resonator},
  author       = {Rueda Sanchez, Alfredo R and Sedlmeir, Florian and Collodo, Michele and Vogl, Ulrich and Stiller, Birgit and Schunk, Gerhard and Strekalov, Dmitry and Marquardt, Christoph and Fink, Johannes M and Painter, Oskar and Leuchs, Gerd and Schwefel, Harald},
  booktitle    = {Optics InfoBase Conference Papers},
  isbn         = {978-155752820-9},
  location     = {Waikoloa, HI, United States},
  publisher    = {Optica Publishing Group},
  title        = {{Single sideband microwave to optical photon conversion-an-electro-optic-realization}},
  doi          = {10.1364/NLO.2017.NM3A.1},
  volume       = {F54},
  year         = {2017},
}

@article{1013,
  abstract     = {From microwave ovens to satellite television to the GPS and data services on our mobile phones, microwave technology is everywhere today. But one technology that has so far failed to prove its worth in this wavelength regime is quantum communication that uses the states of single photons as information carriers. This is because single microwave photons, as opposed to classical microwave signals, are extremely vulnerable to noise from thermal excitations in the channels through which they travel. Two new independent studies, one by Ze-Liang Xiang at Technische Universität Wien (Vienna), Austria, and colleagues [1] and another by Benoît Vermersch at the University of Innsbruck, also in Austria, and colleagues [2] now describe a theoretical protocol for microwave quantum communication that is resilient to thermal and other types of noise. Their approach could become a powerful technique to establish fast links between superconducting data processors in a future all-microwave quantum network.},
  author       = {Fink, Johannes M},
  journal      = {Physics},
  number       = {32},
  publisher    = {American Physical Society},
  title        = {{Viewpoint: Microwave quantum states beat the heat}},
  doi          = {10.1103/Physics.10.32},
  volume       = {10},
  year         = {2017},
}

@article{1020,
  abstract     = {Cellulose is the most abundant biopolymer on Earth. Cellulose fibers, such as the one extracted form cotton or woodpulp, have been used by humankind for hundreds of years to make textiles and paper. Here we show how, by engineering light-matter interaction, we can optimize light scattering using exclusively cellulose nanocrystals. The produced material is sustainable, biocompatible, and when compared to ordinary microfiber-based paper, it shows enhanced scattering strength (×4), yielding a transport mean free path as low as 3.5 μm in the visible light range. The experimental results are in a good agreement with the theoretical predictions obtained with a diffusive model for light propagation.},
  author       = {Caixeiro, Soraya and Peruzzo, Matilda and Onelli, Olimpia and Vignolini, Silvia and Sapienza, Riccardo},
  issn         = {1944-8244},
  journal      = {ACS Applied Materials and Interfaces},
  number       = {9},
  pages        = {7885 -- 7890},
  publisher    = {American Chemical Society},
  title        = {{Disordered cellulose based nanostructures for enhanced light scattering}},
  doi          = {10.1021/acsami.6b15986},
  volume       = {9},
  year         = {2017},
}

@article{796,
  abstract     = {We present the fabrication and characterization of an aluminum transmon qubit on a silicon-on-insulator substrate. Key to the qubit fabrication is the use of an anhydrous hydrofluoric vapor process which selectively removes the lossy silicon oxide buried underneath the silicon device layer. For a 5.6 GHz qubit measured dispersively by a 7.1 GHz resonator, we find T1 = 3.5 μs and T∗2 = 2.2 μs. This process in principle permits the co-fabrication of silicon photonic and mechanical elements, providing a route towards chip-scale integration of electro-opto-mechanical transducers for quantum networking of superconducting microwave quantum circuits. The additional processing steps are compatible with established fabrication techniques for aluminum transmon qubits on silicon.},
  author       = {Keller, Andrew J and Dieterle, Paul and Fang, Michael and Berger, Brett and Fink, Johannes M and Painter, Oskar},
  issn         = {0003-6951},
  journal      = {Applied Physics Letters},
  number       = {4},
  publisher    = {American Institute of Physics},
  title        = {{Al transmon qubits on silicon on insulator for quantum device integration}},
  doi          = {10.1063/1.4994661},
  volume       = {111},
  year         = {2017},
}

@article{797,
  abstract     = {Phasenübergänge helfen beim Verständnis von Vielteilchensystemen in der Festkörperphysik und Fluiddynamik bis hin zur Teilchenphysik. Unserer internationalen Kollaboration ist es gelungen, einen neuartigen Phasenübergang in einem Quantensystem zu beobachten [1]. In einem Mikrowellenresonator konnte erstmals die spontane Zustandsänderung von undurchsichtig zu transparent nachgewiesen werden.},
  author       = {Fink, Johannes M},
  journal      = {Physik in unserer Zeit},
  number       = {3},
  pages        = {111 -- 113},
  publisher    = {Wiley},
  title        = {{Photonenblockade aufgelöst}},
  doi          = {10.1002/piuz.201770305},
  volume       = {48},
  year         = {2017},
}

@article{798,
  abstract     = {Nonreciprocal circuit elements form an integral part of modern measurement and communication systems. Mathematically they require breaking of time-reversal symmetry, typically achieved using magnetic materials and more recently using the quantum Hall effect, parametric permittivity modulation or Josephson nonlinearities. Here we demonstrate an on-chip magnetic-free circulator based on reservoir-engineered electromechanic interactions. Directional circulation is achieved with controlled phase-sensitive interference of six distinct electro-mechanical signal conversion paths. The presented circulator is compact, its silicon-on-insulator platform is compatible with both superconducting qubits and silicon photonics, and its noise performance is close to the quantum limit. With a high dynamic range, a tunable bandwidth of up to 30 MHz and an in situ reconfigurability as beam splitter or wavelength converter, it could pave the way for superconducting qubit processors with multiplexed on-chip signal processing and readout.},
  author       = {Barzanjeh, Shabir and Wulf, Matthias and Peruzzo, Matilda and Kalaee, Mahmoud and Dieterle, Paul and Painter, Oskar and Fink, Johannes M},
  issn         = {2041-1723},
  journal      = {Nature Communications},
  number       = {1},
  publisher    = {Nature Publishing Group},
  title        = {{Mechanical on chip microwave circulator}},
  doi          = {10.1038/s41467-017-01304-x},
  volume       = {8},
  year         = {2017},
}

@article{700,
  abstract     = {Microtubules provide the mechanical force required for chromosome separation during mitosis. However, little is known about the dynamic (high-frequency) mechanical properties of microtubules. Here, we theoretically propose to control the vibrations of a doubly clamped microtubule by tip electrodes and to detect its motion via the optomechanical coupling between the vibrational modes of the microtubule and an optical cavity. In the presence of a red-detuned strong pump laser, this coupling leads to optomechanical-induced transparency of an optical probe field, which can be detected with state-of-the art technology. The center frequency and line width of the transparency peak give the resonance frequency and damping rate of the microtubule, respectively, while the height of the peak reveals information about the microtubule-cavity field coupling. Our method opens the new possibilities to gain information about the physical properties of microtubules, which will enhance our capability to design physical cancer treatment protocols as alternatives to chemotherapeutic drugs.},
  author       = {Barzanjeh, Shabir and Salari, Vahid and Tuszynski, Jack and Cifra, Michal and Simon, Christoph},
  issn         = {2470-0045},
  journal      = {Physical Review E},
  number       = {1},
  publisher    = {American Physical Society},
  title        = {{Optomechanical proposal for monitoring microtubule mechanical vibrations}},
  doi          = {10.1103/PhysRevE.96.012404},
  volume       = {96},
  year         = {2017},
}

@inproceedings{1115,
  abstract     = {We present a coherent microwave to telecom signal converter based on the electro-optical effect using a crystalline WGM-resonator coupled to a 3D microwave cavity, achieving high photon conversion efficiency of 0.1% with MHz bandwidth.},
  author       = {Rueda, Alfredo and Sedlmeir, Florian and Collodo, Michele and Vogl, Ulrich and Stiller, Birgit and Schunk, Georg and Strekalov, Dimitry and Marquardt, Christoph and Fink, Johannes M and Painter, Oskar and Leuchs, Gerd and Schwefel, Harald},
  location     = {San Jose, CA, USA},
  publisher    = {IEEE},
  title        = {{Efficient single sideband microwave to optical conversion using a LiNbO₃ WGM-resonator}},
  doi          = {10.1364/CLEO_SI.2016.SF2G.3},
  year         = {2016},
}

@article{1206,
  abstract     = {We study a polar molecule immersed in a superfluid environment, such as a helium nanodroplet or a Bose–Einstein condensate, in the presence of a strong electrostatic field. We show that coupling of the molecular pendular motion, induced by the field, to the fluctuating bath leads to formation of pendulons—spherical harmonic librators dressed by a field of many-particle excitations. We study the behavior of the pendulon in a broad range of molecule–bath and molecule–field interaction strengths, and reveal that its spectrum features a series of instabilities which are absent in the field-free case of the angulon quasiparticle. Furthermore, we show that an external field allows to fine-tune the positions of these instabilities in the molecular rotational spectrum. This opens the door to detailed experimental studies of redistribution of orbital angular momentum in many-particle systems. © 2016 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim},
  author       = {Redchenko, Elena and Lemeshko, Mikhail},
  journal      = {ChemPhysChem},
  number       = {22},
  pages        = {3649 -- 3654},
  publisher    = {Wiley-Blackwell},
  title        = {{Libration of strongly oriented polar molecules inside a superfluid}},
  doi          = {10.1002/cphc.201601042},
  volume       = {17},
  year         = {2016},
}

@article{1246,
  abstract     = {Near-field imaging is a powerful tool to investigate the complex structure of light at the nanoscale. Recent advances in near-field imaging have indicated the possibility for the complete reconstruction of both electric and magnetic components of the evanescent field. Here we study the electro-magnetic field structure of surface plasmon polariton waves propagating along subwavelength gold nanowires by performing phase- and polarization-resolved near-field microscopy in collection mode. By applying the optical reciprocity theorem, we describe the signal collected by the probe as an overlap integral of the nanowire's evanescent field and the probe's response function. As a result, we find that the probe's sensitivity to the magnetic field is approximately equal to its sensitivity to the electric field. Through rigorous modeling of the nanowire mode as well as the aperture probe response function, we obtain a good agreement between experimentally measured signals and a numerical model. Our findings provide a better understanding of aperture-based near-field imaging of the nanoscopic plasmonic and photonic structures and are helpful for the interpretation of future near-field experiments.},
  author       = {Kabakova, Irina and De Hoogh, Anouk and Van Der Wel, Ruben and Wulf, Matthias and Le Feber, Boris and Kuipers, Laurens},
  journal      = {Scientific Reports},
  publisher    = {Nature Publishing Group},
  title        = {{Imaging of electric and magnetic fields near plasmonic nanowires}},
  doi          = {10.1038/srep22665},
  volume       = {6},
  year         = {2016},
}

@article{1263,
  abstract     = {Linking classical microwave electrical circuits to the optical telecommunication band is at the core of modern communication. Future quantum information networks will require coherent microwave-to-optical conversion to link electronic quantum processors and memories via low-loss optical telecommunication networks. Efficient conversion can be achieved with electro-optical modulators operating at the single microwave photon level. In the standard electro-optic modulation scheme, this is impossible because both up- and down-converted sidebands are necessarily present. Here, we demonstrate true single-sideband up- or down-conversion in a triply resonant whispering gallery mode resonator by explicitly addressing modes with asymmetric free spectral range. Compared to previous experiments, we show a 3 orders of magnitude improvement of the electro-optical conversion efficiency, reaching 0.1% photon number conversion for a 10 GHz microwave tone at 0.42 mW of optical pump power. The presented scheme is fully compatible with existing superconducting 3D circuit quantum electrodynamics technology and can be used for nonclassical state conversion and communication. Our conversion bandwidth is larger than 1 MHz and is not fundamentally limited.},
  author       = {Rueda, Alfredo and Sedlmeir, Florian and Collodo, Michele and Vogl, Ulrich and Stiller, Birgit and Schunk, Gerhard and Strekalov, Dmitry and Marquardt, Christoph and Fink, Johannes M and Painter, Oskar and Leuchs, Gerd and Schwefel, Harald},
  journal      = {Optica},
  number       = {6},
  pages        = {597 -- 604},
  publisher    = {Optica Publishing Group},
  title        = {{Efficient microwave to optical photon conversion: An electro-optical realization}},
  doi          = {10.1364/OPTICA.3.000597},
  volume       = {3},
  year         = {2016},
}

@article{1354,
  abstract     = {Fabrication processes involving anhydrous hydrofluoric vapor etching are developed to create high-Q aluminum superconducting microwave resonators on free-standing silicon membranes formed from a silicon-on-insulator wafer. Using this fabrication process, a high-impedance 8.9-GHz coil resonator is coupled capacitively with a large participation ratio to a 9.7-MHz micromechanical resonator. Two-tone microwave spectroscopy and radiation pressure backaction are used to characterize the coupled system in a dilution refrigerator down to temperatures of Tf=11  mK, yielding a measured electromechanical vacuum coupling rate of g0/2π=24.6  Hz and a mechanical resonator Q factor of Qm=1.7×107. Microwave backaction cooling of the mechanical resonator is also studied, with a minimum phonon occupancy of nm≈16 phonons being realized at an elevated fridge temperature of Tf=211  mK.},
  author       = {Dieterle, Paul and Kalaee, Mahmoud and Fink, Johannes M and Painter, Oskar},
  journal      = {Physical Review Applied},
  number       = {1},
  publisher    = {American Physical Society},
  title        = {{Superconducting cavity electromechanics on a silicon-on-insulator platform}},
  doi          = {10.1103/PhysRevApplied.6.014013},
  volume       = {6},
  year         = {2016},
}

@article{1355,
  abstract     = {Radiation pressure has recently been used to effectively couple the quantum motion of mechanical elements to the fields of optical or microwave light. Integration of all three degrees of freedom—mechanical, optical and microwave—would enable a quantum interconnect between microwave and optical quantum systems. We present a platform based on silicon nitride nanomembranes for integrating superconducting microwave circuits with planar acoustic and optical devices such as phononic and photonic crystals. Using planar capacitors with vacuum gaps of 60 nm and spiral inductor coils of micron pitch we realize microwave resonant circuits with large electromechanical coupling to planar acoustic structures of nanoscale dimensions and femtoFarad motional capacitance. Using this enhanced coupling, we demonstrate microwave backaction cooling of the 4.48 MHz mechanical resonance of a nanobeam to an occupancy as low as 0.32. These results indicate the viability of silicon nitride nanomembranes as an all-in-one substrate for quantum electro-opto-mechanical experiments.},
  author       = {Fink, Johannes M and Kalaee, Mahmoud and Pitanti, Alessandro and Norte, Richard and Heinzle, Lukas and Davanço, Marcelo and Srinivasan, Kartik and Painter, Oskar},
  journal      = {Nature Communications},
  publisher    = {Nature Publishing Group},
  title        = {{Quantum electromechanics on silicon nitride nanomembranes}},
  doi          = {10.1038/ncomms12396},
  volume       = {7},
  year         = {2016},
}

@article{1429,
  abstract     = {Solitons are localized waves formed by a balance of focusing and defocusing effects. These nonlinear waves exist in diverse forms of matter yet exhibit similar properties including stability, periodic recurrence and particle-like trajectories. One important property is soliton fission, a process by which an energetic higher-order soliton breaks apart due to dispersive or nonlinear perturbations. Here we demonstrate through both experiment and theory that nonlinear photocarrier generation can induce soliton fission. Using near-field measurements, we directly observe the nonlinear spatial and temporal evolution of optical pulses in situ in a nanophotonic semiconductor waveguide. We develop an analytic formalism describing the free-carrier dispersion (FCD) perturbation and show the experiment exceeds the minimum threshold by an order of magnitude. We confirm these observations with a numerical nonlinear Schrödinger equation model. These results provide a fundamental explanation and physical scaling of optical pulse evolution in free-carrier media and could enable improved supercontinuum sources in gas based and integrated semiconductor waveguides.},
  author       = {Husko, Chad and Wulf, Matthias and Lefrançois, Simon and Combrié, Sylvain and Lehoucq, Gaëlle and De Rossi, Alfredo and Eggleton, Benjamin and Kuipers, Laurens},
  journal      = {Nature Communications},
  publisher    = {Nature Publishing Group},
  title        = {{Free-carrier-induced soliton fission unveiled by in situ measurements in nanophotonic waveguides}},
  doi          = {10.1038/ncomms11332},
  volume       = {7},
  year         = {2016},
}