Exchange-induced crystallization of soft-core bosons

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dc.contributor.authorCinti, Fabioen_ZA
dc.contributor.authorBoninsegni, Massimoen_ZA
dc.contributor.authorPohl, Thomasen_ZA
dc.date.accessioned2016-04-25T08:56:47Z
dc.date.available2016-04-25T08:56:47Z
dc.date.issued2014-03-28
dc.descriptionCITATION: Cinti, F., Boninsegni, M. & Pohl, T. 2014. Exchange-induced crystallization of soft-core bosons. New Journal of Physics, 16:033038, doi:10.1088/1367-2630/16/3/033038.
dc.descriptionThe original publication is available at http://iopscience.iop.org/journal/1367-2630en_ZA
dc.description.abstractWe study the phase diagram of a two-dimensional assembly of bosons interacting via a soft-core repulsive pair potential of varying strength, and compare it to that of the equivalent system in which particles are regarded as distinguishable. We show that quantum-mechanical exchanges stabilize a ‘cluster crystal’ phase in a wider region of parameter space than predicted by calculations in which exchanges are neglected. This physical effect is diametrically opposite to that which takes place in hard-core Bose systems such as 4He, wherein exchanges strengthen the fluid phase. This is underlain in the cluster crystal phase of soft-core bosons by the free energy gain associated with the formation of local Bose–Einstein condensates.en_ZA
dc.description.urihttp://iopscience.iop.org/article/10.1088/1367-2630/16/3/033038
dc.description.versionPublisher's version
dc.format.extent10 pages : illustrations (some colour)en_ZA
dc.identifier.citationCinti, F., Boninsegni, M. & Pohl, T. 2014. Exchange-induced crystallization of soft-core bosons. New Journal of Physics, 16:033038, doi:10.1088/1367-2630/16/3/033038.en_ZA
dc.identifier.issn1367-2630 (online)
dc.identifier.issn1367-2630 (print)
dc.identifier.otherdoi:10.1088/1367-2630/16/3/033038
dc.identifier.urihttp://hdl.handle.net/10019.1/98940
dc.language.isoen_ZAen_ZA
dc.publisherInstitute of Physicsen_ZA
dc.rights.holderInstitute of Physicsen_ZA
dc.rights.holderDeutsche Physikalische Gesellschaft
dc.subjectSoft-core bosonsen_ZA
dc.subjectQuantum phase transitionsen_ZA
dc.subjectQuantum Monte Carlo simulationsen_ZA
dc.subjectCold atomsen_ZA
dc.titleExchange-induced crystallization of soft-core bosonsen_ZA
dc.typeArticleen_ZA
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