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Article: Trapped ultracold bosons in periodically modulated lattices

TitleTrapped ultracold bosons in periodically modulated lattices
Authors
Issue Date2011
PublisherAmerican Physical Society. The Journal's web site is located at http://pra.aps.org
Citation
Physical Review A - Atomic, Molecular, And Optical Physics, 2011, v. 84 n. 4, article no. 043608 How to Cite?
AbstractMotivated by the recent rapid development of the field of quantum gases in optical lattices, we present a comprehensive study of the spectrum of ultracold atoms in a one-dimensional optical lattice subjected to a periodic lattice modulation. Using the time-dependent density matrix renormalization group method, we study the dynamical response due to lattice modulations in different quantum phases of the system with varying density. For the Mott-insulating state, we identify several excitation processes, which provide important information about the density profile of the gases. For the superfluid, the dynamical response can be well described in a local density approximation. This simplification can be valuable in understanding the strong-correlated superfluid in a slow-varying harmonic potential. All these spectroscopic features of an inhomogeneous system can be used as a test for the validity of the Bose-Hubbard model in a parabolic trapping potential. © 2011 American Physical Society.
Persistent Identifierhttp://hdl.handle.net/10722/175194
ISSN
2014 Impact Factor: 2.808
2015 SCImago Journal Rankings: 1.418
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorHuo, JWen_US
dc.contributor.authorZhang, FCen_US
dc.contributor.authorChen, Wen_US
dc.contributor.authorTroyer, Men_US
dc.contributor.authorSchollwöck, Uen_US
dc.date.accessioned2012-11-26T08:51:08Z-
dc.date.available2012-11-26T08:51:08Z-
dc.date.issued2011en_US
dc.identifier.citationPhysical Review A - Atomic, Molecular, And Optical Physics, 2011, v. 84 n. 4, article no. 043608en_US
dc.identifier.issn1050-2947en_US
dc.identifier.urihttp://hdl.handle.net/10722/175194-
dc.description.abstractMotivated by the recent rapid development of the field of quantum gases in optical lattices, we present a comprehensive study of the spectrum of ultracold atoms in a one-dimensional optical lattice subjected to a periodic lattice modulation. Using the time-dependent density matrix renormalization group method, we study the dynamical response due to lattice modulations in different quantum phases of the system with varying density. For the Mott-insulating state, we identify several excitation processes, which provide important information about the density profile of the gases. For the superfluid, the dynamical response can be well described in a local density approximation. This simplification can be valuable in understanding the strong-correlated superfluid in a slow-varying harmonic potential. All these spectroscopic features of an inhomogeneous system can be used as a test for the validity of the Bose-Hubbard model in a parabolic trapping potential. © 2011 American Physical Society.en_US
dc.languageengen_US
dc.publisherAmerican Physical Society. The Journal's web site is located at http://pra.aps.orgen_US
dc.relation.ispartofPhysical Review A - Atomic, Molecular, and Optical Physicsen_US
dc.titleTrapped ultracold bosons in periodically modulated latticesen_US
dc.typeArticleen_US
dc.identifier.emailZhang, FC: fuchun@hkucc.hku.hken_US
dc.identifier.emailChen, W: wqchen@hku.hken_US
dc.identifier.authorityZhang, FC=rp00840en_US
dc.identifier.authorityChen, W=rp00673en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1103/PhysRevA.84.043608en_US
dc.identifier.scopuseid_2-s2.0-80053586249en_US
dc.identifier.hkuros254574-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-80053586249&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume84en_US
dc.identifier.issue4en_US
dc.identifier.spagearticle no. 043608-
dc.identifier.epagearticle no. 043608-
dc.identifier.isiWOS:000295629100007-
dc.publisher.placeUnited Statesen_US
dc.identifier.scopusauthoridHuo, JW=53867975400en_US
dc.identifier.scopusauthoridZhang, FC=14012468800en_US
dc.identifier.scopusauthoridChen, W=36077405600en_US
dc.identifier.scopusauthoridTroyer, M=8400239500en_US
dc.identifier.scopusauthoridSchollwöck, U=7003926590en_US

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