Quantum phase transitions of interacting bosons and the supersolid phase

被引：128

作者：

vanOtterlo, A ^{[1
]}

Wagenblast, KH ^{[1
]}

Baltin, R ^{[1
]}

Bruder, C ^{[1
]}

Fazio, R ^{[1
]}

Schon, G ^{[1
]}

机构：

[1] UNIV KARLSRUHE,INST THEORET FESTKORPERPHYS,D-76128 KARLSRUHE,GERMANY

来源：

PHYSICAL REVIEW B | 1995年 / 52卷 / 22期

关键词：

D O I：

10.1103/PhysRevB.52.16176

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We investigate the properties of strongly interacting bosons in two dimensions at zero temperature using mean-field theory, a variational ansatz for the ground-state wave function, and Monte Carlo methods. With on-site and short-range interactions a rich phase diagram is obtained. Apart from the homogeneous superfluid and Mott-insulating phases, inhomogeneous charge-density wave phases appear, that are stabilized by the finite-range interaction. Furthermore, our analysis demonstrates the existence of a supersolid phase, in which both long-range order (related to the charge-density wave) and off-diagonal long-range order coexist. We also obtain the critical exponents for the various phase transitions.

引用

页码：16176 / 16186

页数：11

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