Coherent backscattering in the Fock space of ultracold bosonic atoms

[en] We present numerical evidence for the occurrence of coherent backscattering in the Fock space of a small disordered Bose-Hubbard system consisting of four sites and containing five particles. This many-body interference phenomenon can most conveniently be seen in time evolution processes that start from a Fock state of the Bose-Hubbard system. It manifests itself in an enhanced detection probability of this initial state as compared to other Fock states with comparable total energy. We argue that coherent backscattering in Fock space can be experimentally measured with ultracold bosonic atoms in optical lattices using state-of-the-art single-site detection techniques. A synthetic gauge field can be induced in order to break time-reversal symmetry within the lattice and thereby destroy coherent backscattering. While this many-body interference effect is most prominently visible in the presence of eigenstate thermalization, we briefly discuss its significance in the opposite regime of many-body localization.

Disciplines :

Physics

Author, co-author :

Schlagheck, Peter ; Université de Liège > Département de physique > Physique quantique statistique

Dujardin, Julien

Language :

English

Title :

Coherent backscattering in the Fock space of ultracold bosonic atoms

Publication date :

2017

Journal title :

Annalen der Physik

ISSN :

0003-3804

eISSN :

1521-3889

Publisher :

Wiley, Weinheim, Germany

Volume :

529

Pages :

1600311

Peer reviewed :

Peer Reviewed verified by ORBi

Available on ORBi :

since 18 August 2017

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