期刊
CHINESE PHYSICS B
卷 30, 期 2, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1674-1056/abd760
关键词
spinor Bose gases; superfluid-Mott insulator phase transition; Landau-Zener dynamics
资金
- Key-Area Research and Development Program of GuangDong Province, China [2019B030330001]
- National Natural Science Foundation of China [11874434, 11574405]
- Science and Technology Program of Guangzhou, China [201904020024]
- Guangzhou Science and Technology Projects [202002030459]
The research presents a cluster mean-field study on the ground-state phase diagram and many-body dynamics of spin-1 bosons in a two-chain Bose-Hubbard ladder, revealing different phase transitions and the impact of spin-dependent interaction on many-body dynamics.
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 (IntMI) phase. For biased BHL, in addition to the SF and IntMI phases, there appears half-integer filling Mott insulator (HIntMI) phase. The phase transition between the SF and IntMI phases can be first order at a part of phase boundaries, while the phase transition between the SF and HIntMI 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.
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