Thermodynamics and superradiant phase transitions in a three-level Dicke model

被引：9

作者：

Hayn, Mathias ^{[1
]}

Brandes, Tobias ^{[1
]}

机构：

[1] Tech Univ Berlin, Inst Theoret Phys, D-10623 Berlin, Germany

来源：

PHYSICAL REVIEW E | 2017年 / 95卷 / 01期

关键词：

QUANTIZED RADIATION-FIELD; OPTICAL CAVITY; 2-LEVEL ATOMS; COHERENT; SYSTEMS; STATES;

D O I：

10.1103/PhysRevE.95.012153

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

We analyze the thermodynamic properties of a generalized Dicke model, i.e., a collection of three-level systems interacting with two bosonic modes. We show that at finite temperatures the system undergoes first-order phase transitions only, which is in contrast to the zero-temperature case where a second-order phase transition exists as well. We discuss the free energy and prominent expectation values. The limit of vanishing temperature is discussed as well.

引用

页数：9

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