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Zhang, XF; Wang, T; Eggert, S; Pelster, A; Zhang, XF (reprint author), Tech Univ Kaiserslautern, Dept Phys, D-67663 Kaiserslautern, Germany.
Tunable anisotropic superfluidity in an optical kagome superlattice
Source PublicationPHYSICAL REVIEW B
Language英语
AbstractWe study the phase diagram of the Bose-Hubbard model on the kagome lattice with a broken sublattice symmetry. Such a superlattice structure can naturally be created and tuned by changing the potential offset of one sublattice in the optical generation of the frustrated lattice. The superstructure gives rise to a rich quantum phase diagram, which is analyzed by combining quantum Monte Carlo simulations with the generalized effective potential Landau theory. Mott phases with noninteger filling and a characteristic order along stripes are found, which show a transition to a superfluid phase with an anisotropic superfluid density. Surprisingly, the direction of the superfluid anisotropy can be tuned by changing the particle number, the hopping strength, or the interaction. Finally, we discuss characteristic signatures of anisotropic phases in time-of-flight absorption measurements.
2015
Volume92Issue:1Pages:14512
Subject AreaPhysics
DOIhttp://dx.doi.org/10.1103/PhysRevB.92.014512
Indexed BySCI
Funding OrganizationAllianz fur Hochleistungsrechnen Rheinland-Pfalz ; Allianz fur Hochleistungsrechnen Rheinland-Pfalz ; Allianz fur Hochleistungsrechnen Rheinland-Pfalz ; Allianz fur Hochleistungsrechnen Rheinland-Pfalz ; German Research Foundation (DFG) via the Collaborative Research Center [SFB/TR49] ; German Research Foundation (DFG) via the Collaborative Research Center [SFB/TR49] ; German Research Foundation (DFG) via the Collaborative Research Center [SFB/TR49] ; German Research Foundation (DFG) via the Collaborative Research Center [SFB/TR49] ; Chinese Academy of Sciences via the Open Project Program of the State Key Laboratory of Theoretical Physics ; Chinese Academy of Sciences via the Open Project Program of the State Key Laboratory of Theoretical Physics ; Chinese Academy of Sciences via the Open Project Program of the State Key Laboratory of Theoretical Physics ; Chinese Academy of Sciences via the Open Project Program of the State Key Laboratory of Theoretical Physics
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Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/20916
Collection理论物理所科研产出_SCI论文
Corresponding AuthorZhang, XF (reprint author), Tech Univ Kaiserslautern, Dept Phys, D-67663 Kaiserslautern, Germany.
Recommended Citation
GB/T 7714
Zhang, XF,Wang, T,Eggert, S,et al. Tunable anisotropic superfluidity in an optical kagome superlattice[J]. PHYSICAL REVIEW B,2015,92(1):14512.
APA Zhang, XF,Wang, T,Eggert, S,Pelster, A,&Zhang, XF .(2015).Tunable anisotropic superfluidity in an optical kagome superlattice.PHYSICAL REVIEW B,92(1),14512.
MLA Zhang, XF,et al."Tunable anisotropic superfluidity in an optical kagome superlattice".PHYSICAL REVIEW B 92.1(2015):14512.
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