Article (Scientific journals)
Al’tshuler-Aronov-Spivak oscillations of bosonic matter-wave beams in the presence of interaction
Chrétien, Renaud; Rammensee, Josef; Dujardin, Julien et al.
2019In Physical Review. A, Atomic, molecular, and optical physics, 100, p. 033606
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Keywords :
Bose-Einstein condensate; Al'tshuler-Aronov-Spivak; Quantum ring; Coherent backscattering; Atom lasers; Diagrammatic methods; Semiclassical methods; Truncated Wigner
Abstract :
[en] We theoretically study the propagation of a guided atom laser across an Aharonov-Bohm ring <br />which is exposed to a synthetic gauge field. The presence of disorder within the ring gives rise to <br />Al’tshuler-Aronov-Spivak oscillations, seen in the disorder average of the transmission as a function of the effective gauge flux that is contained within the ring. Those oscillations are induced by coherent backscattering and represent a manifestation of weak localisation. Through analytical and numerical calculations that are based on the mean-field Gross-Pitaevskii approximation for the propagating Bose-Einstein condensate, we show that the presence of a very weak atom-atom interaction within the ring leads to an inversion of the Al’tshuler-Aronov-Spivak oscillations, in a very similar manner as for the coherent backscattering of Bose-Einstein condensates within two-dimensional disorder potentials. Numerical simulations based on the Truncated Wigner method reveal that this signature of weak antilocalisation becomes washed out if the interaction strength is increased.
Research center :
CESAM - Complex and Entangled Systems from Atoms to Materials - ULiège
Disciplines :
Physics
Author, co-author :
Chrétien, Renaud ;  Université de Liège - ULiège > Département de physique > Physique quantique statistique
Rammensee, Josef
Dujardin, Julien
Petitjean, Cyril 
Schlagheck, Peter ;  Université de Liège - ULiège > Département de physique > Physique quantique statistique
Language :
English
Title :
Al’tshuler-Aronov-Spivak oscillations of bosonic matter-wave beams in the presence of interaction
Publication date :
05 September 2019
Journal title :
Physical Review. A, Atomic, molecular, and optical physics
ISSN :
1050-2947
eISSN :
1094-1622
Publisher :
American Physical Society, United States - Maryland
Volume :
100
Pages :
033606
Peer reviewed :
Peer Reviewed verified by ORBi
Tags :
CÉCI : Consortium des Équipements de Calcul Intensif
Funders :
DFG - Deutsche Forschungsgemeinschaft [DE]
CÉCI - Consortium des Équipements de Calcul Intensif [BE]
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