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Article: Quantum Monte Carlo study of a two-species bosonic Hubbard model

TitleQuantum Monte Carlo study of a two-species bosonic Hubbard model
Authors
Issue Date2008
PublisherAmerican Physical Society. The Journal's web site is located at http://prb.aps.org/
Citation
Physical Review B - Condensed Matter And Materials Physics, 2008, v. 77 n. 18 How to Cite?
AbstractWe consider a two-species hard-core boson Hubbard model for a supersolid, where two types of bosons represent vacancies and interstitials doped into a commensurate crystal. The on-site interspecies interaction can create bound states of vacancies and interstitials facilitating vacancy condensation at lower energies than in a single-species model, as suggested in an earlier mean-field study. Here, we carry out quantum Monte Carlo simulations to study possible supersolid phases of the model, which correspond to superfluid phases of the vacancies or interstitials. At low temperatures, we find three distinct superfluid phases. The extent of the phases and the nature of the phase transitions are discussed in comparison to mean-field theory. © 2008 The American Physical Society.
Persistent Identifierhttp://hdl.handle.net/10722/80739
ISSN
2014 Impact Factor: 3.736
2015 SCImago Journal Rankings: 1.933
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorGuertler, Sen_HK
dc.contributor.authorTroyer, Men_HK
dc.contributor.authorZhang, FCen_HK
dc.date.accessioned2010-09-06T08:09:45Z-
dc.date.available2010-09-06T08:09:45Z-
dc.date.issued2008en_HK
dc.identifier.citationPhysical Review B - Condensed Matter And Materials Physics, 2008, v. 77 n. 18en_HK
dc.identifier.issn1098-0121en_HK
dc.identifier.urihttp://hdl.handle.net/10722/80739-
dc.description.abstractWe consider a two-species hard-core boson Hubbard model for a supersolid, where two types of bosons represent vacancies and interstitials doped into a commensurate crystal. The on-site interspecies interaction can create bound states of vacancies and interstitials facilitating vacancy condensation at lower energies than in a single-species model, as suggested in an earlier mean-field study. Here, we carry out quantum Monte Carlo simulations to study possible supersolid phases of the model, which correspond to superfluid phases of the vacancies or interstitials. At low temperatures, we find three distinct superfluid phases. The extent of the phases and the nature of the phase transitions are discussed in comparison to mean-field theory. © 2008 The American Physical Society.en_HK
dc.languageengen_HK
dc.publisherAmerican Physical Society. The Journal's web site is located at http://prb.aps.org/en_HK
dc.relation.ispartofPhysical Review B - Condensed Matter and Materials Physicsen_HK
dc.rightsPhysical Review B (Condensed Matter and Materials Physics). Copyright © American Physical Society.en_HK
dc.titleQuantum Monte Carlo study of a two-species bosonic Hubbard modelen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1098-0121&volume=77&spage=184505: 1&epage=6&date=2008&atitle=Quantum+Monte+Carlo+study+of+a+two-species+bosonic+Hubbard+modelen_HK
dc.identifier.emailZhang, FC: fuchun@hkucc.hku.hken_HK
dc.identifier.authorityZhang, FC=rp00840en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1103/PhysRevB.77.184505en_HK
dc.identifier.scopuseid_2-s2.0-43449106216en_HK
dc.identifier.hkuros152500en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-43449106216&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume77en_HK
dc.identifier.issue18en_HK
dc.identifier.isiWOS:000256885300086-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridGuertler, S=6506314372en_HK
dc.identifier.scopusauthoridTroyer, M=7004750165en_HK
dc.identifier.scopusauthoridZhang, FC=14012468800en_HK

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