Off-site trimer superfluid on a one-dimensional optical lattice

doi:10.1088/1674-1056/26/4/043701

中国物理B ›› 2017, Vol. 26 ›› Issue (4): 43701-043701.doi: 10.1088/1674-1056/26/4/043701

• ATOMIC AND MOLECULAR PHYSICS • 上一篇下一篇

Off-site trimer superfluid on a one-dimensional optical lattice

Er-Nv Fan(范二女), Tony C Scott, Wan-Zhou Zhang(张万舟)

1 College of Physics and Optoelectronics, Taiyuan University of Technology, Taiyuan 030024, China;
2 Near India Pvt Ltd, No. 71/72, Jyoti Nivas College Road, Koramangala, Bangalore 560095, India

收稿日期:2016-09-28 修回日期:2017-01-03 出版日期:2017-04-05 发布日期:2017-04-05
通讯作者: Wan-Zhou Zhang E-mail:zhangwanzhou@tyut.edu.cn
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11305113) and the Project GDW201400042 for the "High End Foreign Experts Program".

Off-site trimer superfluid on a one-dimensional optical lattice

Er-Nv Fan(范二女)¹, Tony C Scott^1,2, Wan-Zhou Zhang(张万舟)¹

1 College of Physics and Optoelectronics, Taiyuan University of Technology, Taiyuan 030024, China;
2 Near India Pvt Ltd, No. 71/72, Jyoti Nivas College Road, Koramangala, Bangalore 560095, India

Received:2016-09-28 Revised:2017-01-03 Online:2017-04-05 Published:2017-04-05
Contact: Wan-Zhou Zhang E-mail:zhangwanzhou@tyut.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11305113) and the Project GDW201400042 for the "High End Foreign Experts Program".

摘要/Abstract

摘要： The Bose-Hubbard model with an effective off-site three-body tunneling, characterized by jumps towards one another, between one atom on a site and a pair atoms on the neighborhood site, is studied systematically on a one-dimensional (1D) lattice, by using the density matrix renormalization group method. The off-site trimer superfluid, condensing at momentum k=0, emerges in the softcore Bose-Hubbard model but it disappears in the hardcore Bose-Hubbard model. Our results numerically verify that the off-site trimer superfluid phase derived in the momentum space from [Phys. Rev. A 81, 011601(R) (2010)] is stable in the thermodynamic limit. The off-site trimer superfluid phase, the partially off-site trimer superfluid phase and the Mott insulator phase are found, as well as interesting phase transitions, such as the continuous or first-order phase transition from the trimer superfluid phase to the Mott insulator phase. Our results are helpful in realizing this novel off-site trimer superfluid phase by cold atom experiments.

关键词: Bose-Hubbard model, off-site trimer superfluid, density matrix renormalization group method

Abstract: The Bose-Hubbard model with an effective off-site three-body tunneling, characterized by jumps towards one another, between one atom on a site and a pair atoms on the neighborhood site, is studied systematically on a one-dimensional (1D) lattice, by using the density matrix renormalization group method. The off-site trimer superfluid, condensing at momentum k=0, emerges in the softcore Bose-Hubbard model but it disappears in the hardcore Bose-Hubbard model. Our results numerically verify that the off-site trimer superfluid phase derived in the momentum space from [Phys. Rev. A 81, 011601(R) (2010)] is stable in the thermodynamic limit. The off-site trimer superfluid phase, the partially off-site trimer superfluid phase and the Mott insulator phase are found, as well as interesting phase transitions, such as the continuous or first-order phase transition from the trimer superfluid phase to the Mott insulator phase. Our results are helpful in realizing this novel off-site trimer superfluid phase by cold atom experiments.

Key words: Bose-Hubbard model, off-site trimer superfluid, density matrix renormalization group method

中图分类号: (Atoms in optical lattices)

37.10.Jk

05.30.Jp (Boson systems) 03.75.Lm (Tunneling, Josephson effect, Bose-Einstein condensates in periodic potentials, solitons, vortices, and topological excitations)

范二女, 张万舟. Off-site trimer superfluid on a one-dimensional optical lattice[J]. 中国物理B, 2017, 26(4): 43701-043701.

Er-Nv Fan(范二女), Tony C Scott, Wan-Zhou Zhang(张万舟). Off-site trimer superfluid on a one-dimensional optical lattice[J]. Chin. Phys. B, 2017, 26(4): 43701-043701.

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Off-site trimer superfluid on a one-dimensional optical lattice

Off-site trimer superfluid on a one-dimensional optical lattice

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