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Intrinsic decoherence in an ultracold Bose gas confined in a double-well potential

Caballero Benitez, Santiago; Romero-Rochin, V; Paredes, R

Description

We address the intrinsic decoherence of an N-body interacting bosonic quantum fluid confined in a double-well potential in one dimension, and its effect on the transition from coherent oscillations to self-trapping regimes as a function of the interparticle interaction. Performing a full quantum approach to the N-particle system, we study the transition and the observed decoherence through the analysis of the one-particle reduced density matrix. The results are obtained by following the time...[Show more]

dc.contributor.authorCaballero Benitez, Santiago
dc.contributor.authorRomero-Rochin, V
dc.contributor.authorParedes, R
dc.date.accessioned2015-12-10T22:29:13Z
dc.identifier.issn0953-4075
dc.identifier.urihttp://hdl.handle.net/1885/54801
dc.description.abstractWe address the intrinsic decoherence of an N-body interacting bosonic quantum fluid confined in a double-well potential in one dimension, and its effect on the transition from coherent oscillations to self-trapping regimes as a function of the interparticle interaction. Performing a full quantum approach to the N-particle system, we study the transition and the observed decoherence through the analysis of the one-particle reduced density matrix. The results are obtained by following the time evolution of such a matrix. For large systems and because of the interparticle interactions, the system reaches stationary states which can be characterized both by the vanishing of the off-diagonal matrix elements, in what one may call the preferred basis, and by the value of its associated von Neumman entropy. The present results could be useful in analysing experimental realizations, such as those by Albiez et al (2005 Phys. Rev. Lett. 95 010402).
dc.publisherInstitute of Physics Publishing
dc.sourceJournal of Physics B: Atomic, Molecular and Optical Physics
dc.subjectKeywords: Bose gas; Coherent oscillations; Decoherence; Double-well potential; Inter-particle interaction; Intrinsic decoherence; Large system; matrix; Off-diagonal matrix elements; One dimension; Particle systems; Quantum approach; Quantum fluids; Reduced-density
dc.titleIntrinsic decoherence in an ultracold Bose gas confined in a double-well potential
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume43
dc.date.issued2010
local.identifier.absfor020601 - Degenerate Quantum Gases and Atom Optics
local.identifier.ariespublicationu9201385xPUB310
local.type.statusPublished Version
local.contributor.affiliationCaballero Benitez, Santiago, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationRomero-Rochin, V, Universidad Nacional Autonoma de Mexico
local.contributor.affiliationParedes, R, Universidad Nacional Autonoma de Mexico
local.description.embargo2037-12-31
local.bibliographicCitation.issue095301
local.bibliographicCitation.startpage6
local.identifier.doi10.1088/0953-4075/43/9/095301
dc.date.updated2016-02-24T11:49:43Z
local.identifier.scopusID2-s2.0-77951626750
local.identifier.thomsonID000277077100010
CollectionsANU Research Publications

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