%0 Conference Paper
%F Oral 
%T Spectral gaps for light in a periodic ensemble of ultracold atoms
%+ Groupe d'étude des semiconducteurs (GES)
%A Antezza, Mauro
%< sans comité de lecture
%Z L2C:10-170
%B JPS-ESPCI : “Journées de Physique Statistique”
%C Paris, France
%8 2010-01-19
%D 2010
%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-01910102
%U https://hal.science/hal-01910102
%~ CNRS
%~ UNIV-MONTP2
%~ GES
%~ UNIV-MONTPELLIER
%~ UM1-UM2