TY - JOUR

T1 - Probing and manipulating fermionic and bosonic quantum gases with quantum light

AU - Elliott, Thomas J.

AU - Mazzucchi, Gabriel

AU - Kozlowski, Wojciech

AU - Caballero-Benitez, Santiago F.

AU - Mekhov, Igor B.

N1 - Funding Information: The work is financially supported by the EPSRC (DTA and EP/I004394/1). Jaksch group for use of the TNT library for simulations [39]. Publisher Copyright: © 2015 by the authors. Copyright: Copyright 2019 Elsevier B.V., All rights reserved.

PY - 2015/9/1

Y1 - 2015/9/1

N2 - 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.

AB - 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.

KW - Cavity QED

KW - Many-body quantum systems

KW - Quantum light-matter interactions

KW - Quantum nondemolition measurement

UR - http://www.scopus.com/inward/record.url?scp=84979892411&partnerID=8YFLogxK

U2 - 10.3390/atoms3030392

DO - 10.3390/atoms3030392

M3 - Article

AN - SCOPUS:84979892411

VL - 3

SP - 392

EP - 406

JO - Atoms

JF - Atoms

SN - 2218-2004

IS - 3

ER -