Quantum chaos triggered by precursors of a quantum phase transition: The Dicke model

被引：437

作者：

Emary, C ^{[1
]}

Brandes, T ^{[1
]}

机构：

[1] Univ Manchester, Dept Phys, Manchester M60 1QD, Lancs, England

来源：

PHYSICAL REVIEW LETTERS | 2003年 / 90卷 / 04期

关键词：

D O I：

10.1103/PhysRevLett.90.044101

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We consider the Dicke Hamiltonian, a simple quantum-optical model which exhibits a zero-temperature quantum phase transition. We present numerical results demonstrating that at this transition the system changes from being quasi-integrable to quantum chaotic. By deriving an exact solution in the thermodynamic limit we relate this phenomenon to a localization-delocalization transition in which a macroscopic superposition is generated. We also describe the classical analogs of this behavior.

引用

页数：4

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