Bilinear-biquadratic spin-1 chain undergoing quadratic Zeeman effect

被引：43

作者：

De Chiara, G. ^{[1
,2
]}

Lewenstein, M. ^{[2
,3
,4
]}

Sanpera, A. ^{[1
,2
,4
]}

机构：

[1] Univ Autonoma Barcelona, E-08193 Bellaterra, Spain

[2] Univ Calif Santa Barbara, Kavli Inst Theoret Phys, Santa Barbara, CA 93106 USA

[3] ICFO Inst Ciencies Foton, E-08860 Castelldefels, Spain

[4] ICREA, E-08011 Barcelona, Spain

来源：

PHYSICAL REVIEW B | 2011年 / 84卷 / 05期

关键词：

MATRIX RENORMALIZATION-GROUP; UNIAXIAL ANISOTROPY; QUANTUM; PHASES; DIMERIZATION; SYMMETRY; PHYSICS; GASES; MODEL; S=1;

D O I：

10.1103/PhysRevB.84.054451

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The Heisenberg model for spin-1 bosons in one dimension presents many different quantum phases, including the famous topological Haldane phase. Here we study the robustness of such phases in front of a SU(2) symmetry-breaking field as well as the emergence of unique phases. Previous studies have analyzed the effect of such uniaxial anisotropy in some restricted relevant points of the phase diagram. Here we extend those studies and present the complete phase diagram of the spin-1 chain with uniaxial anisotropy. To this aim, we employ the density-matrix renormalization group together with analytical approaches. The complete phase diagram can be realized using ultracold spinor gases in the Mott insulator regime under a quadratic Zeeman effect.

引用

页数：8

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