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

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.

Keywords: Bose–Hubbard model three-body interaction

Received: 21 June 2013
Revised: 14 August 2013
Accepted manuscript online:

PACS:	03.75.Lm	(Tunneling, Josephson effect, Bose-Einstein condensates in periodic potentials, solitons, vortices, and topological excitations)
	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)

Fund: Project supported by the National Basic Research Program of China (Grant No. 2011CB921504) and the National Natural Science Foundation of China (Grant No. 11104292).

Corresponding Authors: Qian Jun, Wang Yu-Zhu
E-mail: jqian@siom.ac.cn;yzwang@mail.shcnc.ac.cn

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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 2013 Chin. Phys. B 22 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

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