Analytic calculation of high-order corrections to quantum phase transitions of ultracold Bose gases in bipartite superlattices

doi:10.1007/s11467-018-0811-1

Front. Phys.

2018, Vol. 13

Issue (5) : 136402 https://doi.org/10.1007/s11467-018-0811-1

RESEARCH ARTICLE

Analytic calculation of high-order corrections to quantum phase transitions of ultracold Bose gases in bipartite superlattices

Zhi Lin^1,²(

), Wanli Liu¹(

)

¹. Department of Physics and State Key Laboratory of Surface Physics, Fudan University, Shanghai 200433, China
². Shenzhen Institute of Research and Innovation, The University of Hong Kong, Shenzhen 518063, China

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Abstract

We clarify some technical issues in the present generalized effective-potential Landau theory (GEPLT) to make the GEPLT more consistent and complete. Utilizing this clarified GEPLT, we analytically study the quantum phase transitions of ultracold Bose gases in bipartite superlattices at zero temperature. The corresponding quantum phase boundaries are analytically calculated up to the third-order hopping, which are in excellent agreement with the quantum Monte Carlo (QMC) simulations.

Keywords ultracold Bose gases quantum phase transition bipartite superlattice generalized effective-potential Landau theory

Corresponding Author(s): Zhi Lin,Wanli Liu

Issue Date: 10 July 2018

Cite this article:

Zhi Lin,Wanli Liu. Analytic calculation of high-order corrections to quantum phase transitions of ultracold Bose gases in bipartite superlattices[J]. Front. Phys. , 2018, 13(5): 136402.

URL:

https://academic.hep.com.cn/fop/EN/10.1007/s11467-018-0811-1
https://academic.hep.com.cn/fop/EN/Y2018/V13/I5/136402

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