%0 Conference Paper
%F Oral 
%T Light propagation in a periodic ensemble of ultracold atoms
%+ Laboratoire Kastler Brossel (LKB (Lhomond))
%A Antezza, Mauro
%F Invité
%< sans comité de lecture
%Z L2C:09-099
%B CEWQO2009
%C Turku, Finland
%8 2009-05-25
%D 2009
%Z Physics [physics]/Quantum Physics [quant-ph]
%Z Physics [physics]/Condensed Matter [cond-mat]/Quantum Gases [cond-mat.quant-gas]
%Z Physics [physics]/Physics [physics]/Atomic and Molecular Clusters [physics.atm-clus]
%Z Physics [physics]/Physics [physics]/Atomic Physics [physics.atom-ph]
%Z Physics [physics]/Physics [physics]/Optics [physics.optics]Conference papers
%X We address the general problem of the excitation spectrum for light coupled to scatterers havingquantum fluctuating positions around the sites of a periodic lattice. In addition to providing an imaginarypart to the spectrum, we show that these quantum fluctuations affect the real part of the spectrum, in a waythat we determine analytically. Our predictions may be observed with ultracold atoms in an optical lattice,on a J 1⁄4 0 ! J0 1⁄4 1 narrow atomic transition. As a side result, we resolve a controversy for theoccurrence of a spectral gap in a fcc lattice.
%G English
%L hal-01910115
%U https://hal.science/hal-01910115
%~ ENS-PARIS
%~ LKB
%~ CNRS
%~ ALLINSP
%~ PSL
%~ SORBONNE-UNIVERSITE
%~ SU-INF-2018
%~ SU-SCIENCES
%~ ENS-PSL
%~ ALLIANCE-SU