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Atoms 2015, 3(3), 392-406; doi:10.3390/atoms3030392

Probing and Manipulating Fermionic and Bosonic Quantum Gases with Quantum Light

Department of Physics, Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, UK
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Academic Editors: Jonathan Goldwin and Duncan O’Dell
Received: 25 June 2015 / Accepted: 27 August 2015 / Published: 2 September 2015
(This article belongs to the Special Issue Cavity Quantum Electrodynamics with Ultracold Atoms)
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Abstract

We study the atom-light interaction in the fully quantum regime, with the focus on off-resonant light scattering into a cavity from ultracold atoms trapped in an optical lattice. The detection of photons allows the quantum nondemolition (QND) measurement of quantum correlations of the atomic ensemble, distinguishing between different quantum states. We analyse the entanglement between light and matter and show how it can be exploited for realising multimode macroscopic quantum superpositions, such as Schrödinger cat states, for both bosons and fermions. We provide examples utilising different measurement schemes and study their robustness to decoherence. Finally, we address the regime where the optical lattice potential is a quantum dynamical variable and is modified by the atomic state, leading to novel quantum phases and significantly altering the phase diagram of the atomic system. View Full-Text
Keywords: quantum light-matter interactions; many-body quantum systems; cavity QED; quantum nondemolition measurement quantum light-matter interactions; many-body quantum systems; cavity QED; quantum nondemolition measurement
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Elliott, T.J.; Mazzucchi, G.; Kozlowski, W.; Caballero-Benitez , S.F.; Mekhov, I.B. Probing and Manipulating Fermionic and Bosonic Quantum Gases with Quantum Light. Atoms 2015, 3, 392-406.

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