Cluster mean-field study of spinor Bose-Hubbard ladder:Ground-state phase diagram and many-body population dynamics  

作　　者：Li Zhang Wenjie Liu Jiahao Huang Chaohong Lee 张莉;柳文洁;黄嘉豪;李朝红(Guangdong Provincial Key Laboratory of Quantum Metrology and Sensing&School of Physics and Astronomy,Sun Yat-Sen University(Zhuhai Campus),Zhuhai 519082,China;State Key Laboratory of Optoelectronic Materials and Technologies,Sun Yat-Sen University(Guangzhou Campus),Guangzhou 510275,China)

机构地区：[1]Guangdong Provincial Key Laboratory of Quantum Metrology and Sensing&School of Physics and Astronomy,Sun Yat-Sen University(Zhuhai Campus),Zhuhai 519082,China [2]State Key Laboratory of Optoelectronic Materials and Technologies,Sun Yat-Sen University(Guangzhou Campus),Guangzhou 510275,China

出　　处：《Chinese Physics B》2021年第2期95-102,共8页中国物理B（英文版）

基　　金：Project supported by the Key-Area Research and Development Program of Guang Dong Province,China(Grant No.2019B030330001);the National Natural Science Foundation of China(Grant Nos.11874434 and 11574405);the Science and Technology Program of Guangzhou,China(Grant No.201904020024);the Guangzhou Science and Technology Projects(Grant No.202002030459)。

摘　　要：We present a cluster mean-field study for ground-state phase diagram and many-body dynamics of spin-1 bosons confined in a two-chain Bose-Hubbard ladder(BHL).For unbiased BHL,we find superfluid(SF)phase and integer filling Mott insulator(Int MI)phase.For biased BHL,in addition to the SF and Int MI phases,there appears half-integer filling Mott insulator(HInt MI)phase.The phase transition between the SF and Int MI phases can be first order at a part of phase boundaries,while the phase transition between the SF and HInt MI phases is always second order.By tuning the bias energy,we report on the change of the nature of SF-MI phase transitions.Furthermore,we study the effect of the spin-dependent interaction on the many-body population dynamics.The spin-dependent interaction can lead to rich dynamical behaviors,but does not influence the particle transfer efficiency.Our results indicate a way to tune the nature of the SF-MI phase transition and open a new avenue to study the many-body dynamics of spinor bosons in optical lattices.

关 键 词：spinor Bose gases superfluid-Mott insulator phase transition Landau-Zener dynamics 

分 类 号：O313.7[理学—一般力学与力学基础]