Reference : Coherent backscattering of Bose-Einstein condensates in two-dimensional disorder pote...
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Physics
http://hdl.handle.net/2268/75074
Coherent backscattering of Bose-Einstein condensates in two-dimensional disorder potentials
English
Hartung, Michael [> > > >]
Wellens, Thomas [> > > >]
Mueller, Cord A [> > > >]
Richter, Klaus [> > > >]
Schlagheck, Peter mailto [Université de Liège - ULg > Département de physique > Physique quantique statistique >]
2008
Physical Review Letters
American Physical Society
101
2
020603
Yes (verified by ORBi)
International
0031-9007
1079-7114
Ridge
NY
[en] We study quantum transport of an interacting Bose-Einstein condensate in a two-dimensional disorder potential. In the limit of a vanishing atom-atom interaction, a sharp cone in the angle-resolved density of the scattered matter wave is observed, arising from constructive interference between amplitudes propagating along reversed scattering paths. Weak interaction transforms this coherent backscattering peak into a pronounced dip, indicating destructive instead of constructive interference. We reproduce this result, obtained from the numerical integration of the Gross-Pitaevskii equation, by a diagrammatic theory of weak localization in the presence of nonlinearity.
http://hdl.handle.net/2268/75074
10.1103/PhysRevLett.101.020603

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