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quant-ph2021

Observation of coherent coupling between super- and subradiant states of an ensemble of cold atoms collectively coupled to a single propagating optical mode

Riccardo Pennetta, Daniel Lechner, Martin Blaha +3

We discuss the evolution of the quantum state of an ensemble of atoms that are coupled via a single propagating optical mode. We theoretically show that the quantum state of N atom…

quant-ph2021★ 34 cited

Wading through the void: Exploring quantum friction and nonequilibrium fluctuations

Daniel Reiche, Francesco Intravaia, Kurt Busch

When two or more objects move relative to one another in vacuum, they experience a drag force which, at zero temperature, usually goes under the name of quantum friction. This cont…

quant-ph2021

Dimensional Expressivity Analysis, best-approximation errors, and automated design of parametric quantum circuits

Lena Funcke, Tobias Hartung, Karl Jansen +3

The design of parametric quantum circuits (PQCs) for efficient use in variational quantum simulations (VQS) is subject to two competing factors. On one hand, the set of states that…

quant-ph2021

Cavity optomechanics with ultra-cold Bose gases for quasiparticle state manipulation and prospects for sensing applications

Benjamin Maaß, Daniel Hartley, Kurt Busch +1

Ensembles of ultra-cold atoms have been proven to be versatile tools for high precision sensing applications. Here, we present a method for manipulation and readout of the state of…

quant-ph2021★ 8 cited

Topical White Paper: A Case for Quantum Memories in Space

Mustafa Gündoğan, Thomas Jennewein, Faezeh Kimiaee Asadi +20

It has recently been theoretically shown that Quantum Memories (QM) could enable truly global quantum networking when deployed in space thereby surpassing the limited range of land…

quant-ph2021★ 13 cited

Electromagnetic Viscosity in Complex Structured Environments: From black-body to Quantum Friction

M. Oelschläger, D. Reiche, C. H. Egerland +2

We investigate the nonconservative open-system dynamics of an atom in a generic complex structured electromagnetic environment at temperature . In such systems, when the atom mo…

quant-ph2021★ 33 cited

Towards Quantum Simulations in Particle Physics and Beyond on Noisy Intermediate-Scale Quantum Devices

Lena Funcke, Tobias Hartung, Karl Jansen +4

We review two algorithmic advances that bring us closer to reliable quantum simulations of model systems in high energy physics and beyond on noisy intermediate-scale quantum (NISQ…

quant-ph2021★ 56 cited

Simulating quantum repeater strategies for multiple satellites

Julius Wallnöfer, Frederik Hahn, Mustafa Gündoğan +5

A global quantum repeater network involving satellite-based links is likely to have advantages over fiber-based networks in terms of long-distance communication, since the photon l…

quant-ph2021★ 27 cited

Estimating gate-set properties from random sequences

J. Helsen, M. Ioannou, J. Kitzinger +4

With quantum computing devices increasing in scale and complexity, there is a growing need for tools that obtain precise diagnostic information about quantum operations. However, c…

quant-ph2021★ 66 cited

Collective radiative dynamics of an ensemble of cold atoms coupled to an optical waveguide

Riccardo Pennetta, Martin Blaha, Aisling Johnson +4

We experimentally and theoretically investigate collective radiative effects in an ensemble of cold atoms coupled to a single-mode optical nanofiber. Our analysis unveils the micro…

quant-ph2021★ 16 cited

Constraining modified gravity with quantum optomechanics

Sofia Qvarfort, Dennis Rätzel, Stephen Stopyra

We derive the best possible bounds that can be placed on Yukawa- and chameleon-like modifications to the Newtonian gravitational potential with a cavity optomechanical quantum sens…

quant-ph2021★ 56 cited

Atomic spin-controlled non-reciprocal Raman amplification of fibre-guided light

Sebastian Pucher, Christian Liedl, Shuwei Jin +2

In a non-reciprocal optical amplifier, gain depends on whether the light propagates forwards or backwards through the device. Typically, one requires either the magneto-optical eff…

quant-ph2021★ 28 cited

Beyond the Tavis-Cummings model: revisiting cavity QED with atomic ensembles

Martin Blaha, Aisling Johnson, Arno Rauschenbeutel +1

The interaction of an ensemble of two-level atoms with a single mode electromagnetic field is described by the Tavis-Cummings model. There, the collectively enhanced light-matt…

quant-ph2021★ 40 cited

Mid-Infrared Microscopy via Position Correlations of Undetected Photons

Inna Kviatkovsky, Helen M. Chrzanowski, Sven Ramelow

Quantum imaging with undetected photons (QIUP) has recently emerged as a new powerful imaging tool. Exploiting the spatial entanglement of photon pairs, it allows decoupling of the…

quant-ph2021★ 23 cited

Optimized diamond inverted nanocones for enhanced color center to fiber coupling

Cem Güney Torun, Philipp-Immanuel Schneider, Martin Hammerschmidt +3

Nanostructures can be used for boosting the light outcoupling of color centers in diamond; however, the fiber coupling performance of these nanostructures is rarely investigated. H…

quant-ph2021★ 6 cited

Multiphoton resonance in a driven Kerr oscillator in presence of high-order nonlinearities

Evgeny V. Anikin, Natalya S. Maslova, Nikolay A. Gippius +1

We considered the multiphoton resonance in the periodically driven quantum oscillator with Kerr nonlinearity in the presence of weak high-order nonlinearities. Multiphoton resonanc…

quant-ph2021★ 8 cited

Using graphene conductors to enhance the functionality of atom-chips

K. Wongcharoenbhorn, R. Crawford, N. Welch +6

We show that the performance and functionality of atom-chips can be transformed by using graphene-based van der Waals heterostructures to overcome present limitations on the lifeti…

quant-ph2021★ 16 cited

Coherent Interactions Between Silicon-Vacancy Centers in Diamond

Matthew W. Day, Kelsey M. Bates, Christopher L. Smallwood +5

We report coherent interactions within an ensemble of silicon-vacancy color centers in diamond. The interactions are ascribed to resonant dipole-dipole coupling. Further, we demons…

quant-ph2021★ 5 cited

Pulse shaping for on-demand emission of single Raman photons from a quantum-dot biexciton

Tom Praschan, Dirk Heinze, Dominik Breddermann +3

Semiconductor quantum dots embedded in optical cavities are promising on-demand sources of single photons. Here, we theoretically study single photon emission from an optically dri…

quant-ph2021★ 18 cited

No-slip boundary conditions for electron hydrodynamics and the thermal Casimir pressure

Mandy Hannemann, Gino Wegner, Carsten Henkel

We derive modified reflection coefficients for electromagnetic waves in the THz and far infrared range. The idea is based on hydrodynamic boundary conditions for metallic conductio…

quant-ph2021★ 8 cited

Low random duty-cycle errors in periodically-poled KTP revealed by sum-frequency generation

Felix Mann, Helen M. Chrzanowski, Sven Ramelow

Low-noise quantum frequency conversion in periodically-poled nonlinear crystals has proved challenging when the pump wavelength is shorter than the target wavelength. This is - at…

quant-ph2021★ 16 cited

Ground State Microwave-Stimulated Raman Transitions and Adiabatic Spin Transfer in the Nitrogen-Vacancy Center

Florian Böhm, Niko Nikolay, Sascha Neinert +2

Microwave pulse sequences are the basis of coherent manipulation of the electronic spin ground state in nitrogen-vacancy (NV) centers. In this work we demonstrate stimulated Raman…

quant-ph2021★ 266 cited

Advances in Space Quantum Communications

Jasminder S. Sidhu, Siddarth K. Joshi, Mustafa Gundogan +15

Concerted efforts are underway to establish an infrastructure for a global quantum internet to realise a spectrum of quantum technologies. This will enable more precise sensors, se…

quant-ph2021★ 10 cited

Bragg condition for scattering into a guided optical mode

B. Olmos, C. Liedl, I. Lesanovsky +1

We theoretically investigate light scattering from an array of atoms into the guided modes of a waveguide. We show that the scattering of a plane wave laser field into the waveguid…