Dimerized and trimerized phases for spin-2 bosons in a one-dimensional optical lattice

被引：14

作者：

Chen, Pochung ^{[1
]}

Xue, Zhi-Long ^{[1
]}

McCulloch, I. P. ^{[2
]}

Chung, Ming-Chiang ^{[3
]}

Yip, S. -K. ^{[4
]}

机构：

[1] Natl Tsing Hua Univ, Dept Phys, Hsinchu 30013, Taiwan

[2] Univ Queensland, Sch Phys Sci, Brisbane, Qld 4072, Australia

[3] Natl Ctr Theoret Sci, Div Phys, Hsinchu 30013, Taiwan

[4] Acad Sinica, Inst Phys, Taipei 11529, Taiwan

来源：

PHYSICAL REVIEW A | 2012年 / 85卷 / 01期

基金：

澳大利亚研究理事会;

关键词：

BOSE-EINSTEIN CONDENSATION; GAS; TRANSITION;

D O I：

10.1103/PhysRevA.85.011601

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We study the phase diagram for spin-2 bosons loaded in a one-dimensional optical lattice. By using the non-Abelian density matrix renormalization group (DMRG) method we identify three possible phases: ferromagnetic, dimerized, and trimerized phases. We sketch the phase boundaries based on DMRG. We illustrate two methods for identifying the phases. The first method is based on the spin-spin correlation function, while in the second method one observes the excitation gap as a dimerization, or a trimerization superlattice is imposed. The advantage of the second method is that it also can be easily implemented in experiments. By using the scattering lengths in the literature we estimate that Rb-83, Na-23, and Rb-87 can be ferromagnetic, dimerized, and trimerized, respectively.

引用

页数：4

共 42 条

[1] EXACT RESULTS ON THE DIMERIZATION TRANSITION IN SU(N) ANTIFERROMAGNETIC CHAINS [J].