Effects of effective attractive multi-body interaction on quantum phase and transport dynamics of a strongly correlated bosonic gas across the superfluid to Mott insulator transition

doi:10.1088/1674-1056/22/11/110307

中国物理B ›› 2013, Vol. 22 ›› Issue (11): 110307-110307.doi: 10.1088/1674-1056/22/11/110307

Effects of effective attractive multi-body interaction on quantum phase and transport dynamics of a strongly correlated bosonic gas across the superfluid to Mott insulator transition

孙剑芳^{a b}, 崔国栋^{a b}, 姜伯楠^{a b}, 钱军^a, 王育竹^a

a Key Laboratory for Quantum Optics, Center for Cold Atom Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China;
b University of Chinese Academy of Sciences, Beijing 100049, China

收稿日期:2013-06-21 修回日期:2013-08-14 出版日期:2013-09-28 发布日期:2013-09-28
基金资助:
Project supported by the National Basic Research Program of China (Grant No. 2011CB921504) and the National Natural Science Foundation of China (Grant No. 11104292).

Effects of effective attractive multi-body interaction on quantum phase and transport dynamics of a strongly correlated bosonic gas across the superfluid to Mott insulator transition

Sun Jian-Fang (孙剑芳)^{a b}, Cui Guo-Dong (崔国栋)^{a b}, Jiang Bo-Nan (姜伯楠)^{a b}, Qian Jun (钱军)^a, Wang Yu-Zhu (王育竹)^a

a Key Laboratory for Quantum Optics, Center for Cold Atom Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China;
b University of Chinese Academy of Sciences, Beijing 100049, China

Received:2013-06-21 Revised:2013-08-14 Online:2013-09-28 Published:2013-09-28
Contact: Qian Jun, Wang Yu-Zhu E-mail:jqian@siom.ac.cn;yzwang@mail.shcnc.ac.cn
Supported by:
Project supported by the National Basic Research Program of China (Grant No. 2011CB921504) and the National Natural Science Foundation of China (Grant No. 11104292).

摘要/Abstract

摘要： We theoretically investigate quantum phases and transport dynamics of ultracold atoms trapped in an optical lattice in the presence of effective multi-body interaction. When a harmonic external potential is added, several interesting phenomena are revealed, such as the broadening and the emergence of a central insulator plateau and the phase transition between superfluid and Mott insulator phase. We also study the transport of the system which runs across the superfluid–insulator transition after ramping up the lattice, and predict a slower relaxation which is attributed to the influence of the multi-body interaction on the mass transport.

关键词: Bose–Hubbard model, three-body interaction

Abstract: We theoretically investigate quantum phases and transport dynamics of ultracold atoms trapped in an optical lattice in the presence of effective multi-body interaction. When a harmonic external potential is added, several interesting phenomena are revealed, such as the broadening and the emergence of a central insulator plateau and the phase transition between superfluid and Mott insulator phase. We also study the transport of the system which runs across the superfluid–insulator transition after ramping up the lattice, and predict a slower relaxation which is attributed to the influence of the multi-body interaction on the mass transport.

Key words: Bose–Hubbard model, three-body interaction

中图分类号: (Tunneling, Josephson effect, Bose-Einstein condensates in periodic potentials, solitons, vortices, and topological excitations)

03.75.Lm

03.75.Kk (Dynamic properties of condensates; collective and hydrodynamic excitations, superfluid flow) 67.85.-d (Ultracold gases, trapped gases) 05.60.Gg (Quantum transport)

孙剑芳, 崔国栋, 姜伯楠, 钱军, 王育竹. Effects of effective attractive multi-body interaction on quantum phase and transport dynamics of a strongly correlated bosonic gas across the superfluid to Mott insulator transition[J]. 中国物理B, 2013, 22(11): 110307-110307.

Sun Jian-Fang (孙剑芳), Cui Guo-Dong (崔国栋), Jiang Bo-Nan (姜伯楠), Qian Jun (钱军), Wang Yu-Zhu (王育竹). Effects of effective attractive multi-body interaction on quantum phase and transport dynamics of a strongly correlated bosonic gas across the superfluid to Mott insulator transition[J]. Chin. Phys. B, 2013, 22(11): 110307-110307.

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Effects of effective attractive multi-body interaction on quantum phase and transport dynamics of a strongly correlated bosonic gas across the superfluid to Mott insulator transition

Effects of effective attractive multi-body interaction on quantum phase and transport dynamics of a strongly correlated bosonic gas across the superfluid to Mott insulator transition

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