Poster (Scientific congresses and symposiums)
Aharonov-Bohm oscillations of bosonic matter-wave beams in the presence of disorder and interaction
Chrétien, Renaud; Dujardin, Julien; Petitjean, Cyril et al.
2016Annual Scientific Meeting of the Belgian Physical Society
 

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Keywords :
Quantum transport; Bose-Einstein condensates; Aharonov-Bohm effect; Ultracold atoms; Aronov Al'tshuler Spivak oscillations; Truncated Wigner method
Abstract :
[en] We study the one-dimensional (1D) transport properties of an ultracold gas of Bose-Einstein condensed atoms through Aharonov-Bohm (AB) rings. Our system consists of a Bose-Einstein condensate (BEC) that is outcoupled from a magnetic trap into a 1D waveguide which is made of two semi-infinite leads that join a ring geometry exposed to a synthetic magnetic flux φ. We specifically investigate the effects both of a disorder potential and of a small atom-atom contact interaction strength on the AB oscillations. The main numerical tools that we use for this purpose are a mean-field Gross-Pitaevskii (GP) description and the truncated Wigner (tW) method. We find that a correlated disorder suppress the AB oscillations leaving thereby place to weaker amplitude, half period oscillations on transmission, namely the Aronov-Al’tshuler-Spivak (AAS) oscillations. The competition between disorder and interaction leads to a flip of the transmission at the AB flux φ = π. This flip could be a possible preliminary signature of an inversion of the coherent backscattering (CBS) peak. Our study paves the way to an analytical description of the inversion of that peak.
Research center :
Physique Quantique Statistique
Disciplines :
Physics
Author, co-author :
Chrétien, Renaud ;  Université de Liège > Département de physique > Physique quantique statistique
Dujardin, Julien
Petitjean, Cyril ;  Université de Liège > Département de physique > Physique quantique statistique
Schlagheck, Peter ;  Université de Liège > Département de physique > Physique quantique statistique
Language :
English
Title :
Aharonov-Bohm oscillations of bosonic matter-wave beams in the presence of disorder and interaction
Publication date :
18 May 2016
Number of pages :
A0
Event name :
Annual Scientific Meeting of the Belgian Physical Society
Event organizer :
Belgian Physical Society
Event place :
Ghent, Belgium
Event date :
18/05/2016
Available on ORBi :
since 20 May 2016

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