Physical replicas and the Bose glass in cold atomic gases

摘要: We study cold atomic gases in a disorder potential and analyse the correlations between different systems subjected to same landscape. Such independent copies with landscape are known as replicas. While, general, these not accessible experimentally condensed matter systems, they can be realized using standard tools for controlling an optical lattice. Of special interest is overlap function which represents natural order parameter disordered correlation atoms of two replicas disorder. demonstrate efficient measurement scheme determination this disorder-induced function. As application, we focus on Bose–Hubbard model determine within perturbation theory numerical analysis. find that allows identification Bose-glass phase certain regimes.