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Article: Trapped ultracold bosons in periodically modulated lattices
Title | Trapped ultracold bosons in periodically modulated lattices |
---|---|
Authors | |
Issue Date | 2011 |
Publisher | American 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? |
Abstract | Motivated 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 Identifier | http://hdl.handle.net/10722/175194 |
ISSN | 2014 Impact Factor: 2.808 |
ISI Accession Number ID | |
References |
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Huo, JW | en_US |
dc.contributor.author | Zhang, FC | en_US |
dc.contributor.author | Chen, W | en_US |
dc.contributor.author | Troyer, M | en_US |
dc.contributor.author | Schollwöck, U | en_US |
dc.date.accessioned | 2012-11-26T08:51:08Z | - |
dc.date.available | 2012-11-26T08:51:08Z | - |
dc.date.issued | 2011 | en_US |
dc.identifier.citation | Physical Review A (Atomic, Molecular and Optical Physics), 2011, v. 84 n. 4, article no. 043608 | - |
dc.identifier.issn | 1050-2947 | en_US |
dc.identifier.uri | http://hdl.handle.net/10722/175194 | - |
dc.description.abstract | Motivated 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.language | eng | en_US |
dc.publisher | American Physical Society. The Journal's web site is located at http://pra.aps.org | en_US |
dc.relation.ispartof | Physical Review A (Atomic, Molecular and Optical Physics) | - |
dc.title | Trapped ultracold bosons in periodically modulated lattices | en_US |
dc.type | Article | en_US |
dc.identifier.email | Zhang, FC: fuchun@hkucc.hku.hk | en_US |
dc.identifier.email | Chen, W: wqchen@hku.hk | en_US |
dc.identifier.authority | Zhang, FC=rp00840 | en_US |
dc.identifier.authority | Chen, W=rp00673 | en_US |
dc.description.nature | link_to_subscribed_fulltext | en_US |
dc.identifier.doi | 10.1103/PhysRevA.84.043608 | en_US |
dc.identifier.scopus | eid_2-s2.0-80053586249 | en_US |
dc.identifier.hkuros | 254574 | - |
dc.relation.references | http://www.scopus.com/mlt/select.url?eid=2-s2.0-80053586249&selection=ref&src=s&origin=recordpage | en_US |
dc.identifier.volume | 84 | en_US |
dc.identifier.issue | 4 | en_US |
dc.identifier.spage | article no. 043608 | - |
dc.identifier.epage | article no. 043608 | - |
dc.identifier.isi | WOS:000295629100007 | - |
dc.publisher.place | United States | en_US |
dc.identifier.scopusauthorid | Huo, JW=53867975400 | en_US |
dc.identifier.scopusauthorid | Zhang, FC=14012468800 | en_US |
dc.identifier.scopusauthorid | Chen, W=36077405600 | en_US |
dc.identifier.scopusauthorid | Troyer, M=8400239500 | en_US |
dc.identifier.scopusauthorid | Schollwöck, U=7003926590 | en_US |
dc.identifier.issnl | 1050-2947 | - |