Reference : Aharonov-Bohm oscillations of bosonic matter-wave beams in the presence of disorder a...
Scientific congresses and symposiums : Poster
Physical, chemical, mathematical & earth Sciences : Physics
http://hdl.handle.net/2268/200422
Aharonov-Bohm oscillations of bosonic matter-wave beams in the presence of disorder and interaction
English
Chrétien, Renaud mailto [Université de Liège > Département de physique > Physique quantique statistique >]
Dujardin, Julien []
Petitjean, Cyril mailto [Université de Liège > Département de physique > Physique quantique statistique >]
Schlagheck, Peter mailto [Université de Liège > Département de physique > Physique quantique statistique >]
27-Jul-2016
A0
Yes
Yes
International
XVIII Giambiagi winter school : quantum chaos & control
from 25-07-2016 to 29-07-2016
Physics Department of Exact and Natural Sciences School of the University of Buenos Aires, Argentina
Buenos Aires
Argentina
[en] Quantum transport ; Bose-Einstein condensates ; Aharonov-Bohm effect ; Ultracold atoms ; Aronov Al'tshuler Spivak oscillations ; Truncated Wigner method ; Weak localisation ; Coherent backscattering
[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 Aronov-Al’tshuler-Spivak (AAS) oscillations. The competition between disorder and interaction leads to a peak inversion at Φ = π, that is a signature of a coherent backscattering (CBS) peak inversion. This
is confirmed by truncated Wigner simulations.
Physique quantique statistique
Researchers
http://hdl.handle.net/2268/200422

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