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

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 phenom- ena are revealed, such as the broadening and the emergence...

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Published inChinese physics B Vol. 22; no. 11; pp. 204 - 210
Main Author 孙剑芳 崔国栋 姜伯楠 钱军 王育竹
Format Journal Article
LanguageEnglish
Published 01.11.2013
Subjects
Dynamic tests
Dynamics
Fluids
Insulators
Optical lattices
Phase transformations
Superfluidity
Transport
吸引力
多体相互作用
玻色气体
相变系统
绝缘体
超流
运输
量子
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ISSN1674-1056
2058-3834
1741-4199
DOI10.1088/1674-1056/22/11/110307

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Summary: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 phenom- ena are revealed, such as the broadening and the emergence of a central insulator plateau and the phase transition between superftuid 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.
Bibliography: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 phenom- ena are revealed, such as the broadening and the emergence of a central insulator plateau and the phase transition between superftuid 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.
Sun Jian-Fang, Cui Guo-Dong, Jiang Bo-Nan, Qian Jun, Wang Yu-Zhu（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
11-5639/O4
Bose-Hubbard model, three-body interaction
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ISSN:1674-1056
2058-3834
1741-4199
DOI:10.1088/1674-1056/22/11/110307