Reference : Coherent backscattering in the Fock space of ultracold bosonic atoms
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Physics
http://hdl.handle.net/2268/213645
Coherent backscattering in the Fock space of ultracold bosonic atoms
English
Schlagheck, Peter mailto [Université de Liège > Département de physique > Physique quantique statistique >]
Dujardin, Julien [> >]
2017
Annalen der Physik
Wiley
529
1600311
Yes (verified by ORBi)
International
0003-3804
1521-3889
Weinheim
Germany
[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.
Researchers
http://hdl.handle.net/2268/213645
10.1002/andp.201600311

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