Dynamical mean field theory of the Bose-Hubbard model

被引：88

作者：

Amico, L

Penna, V

机构：

[1] Univ Augsburg, Inst Phys, D-86135 Augsburg, Germany

[2] Univ Catania, Fac Ingn, Ist Fis, I-95129 Catania, Italy

[3] Unita INFM, I-95129 Catania, Italy

[4] Politecn Torino, Dipartimento Fis, I-10129 Turin, Italy

[5] Unita INFM, I-10129 Turin, Italy

来源：

PHYSICAL REVIEW LETTERS | 1998年 / 80卷 / 10期

关键词：

D O I：

10.1103/PhysRevLett.80.2189

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Quantum dynamics of the Bose-Hubbard model is investigated through a semiclassical Hamiltonian picture provided by the time-dependent variational principle method. The system is studied within a factorized slow/fast dynamics. The semiclassical requantization procedure allows one to account for the strong quantum nature of the system when t/U much less than 1. The phase diagram is in good agreement with quantum Monte Carlo results and third order strong coupling perturbative expansion.

引用

页码：2189 / 2192

页数：4

共 18 条

[1] WORLD-LINE QUANTUM MONTE-CARLO ALGORITHM FOR A ONE-DIMENSIONAL BOSE MODEL [J].