Nonequilibrium Quantum Phase Transitions in the Dicke Model
Nonequilibrium Quantum Phase Transitions in the Dicke Model
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DOI：
10.1103/physrevlett.108.043003
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发表时间：
2012-01-25
影响因子：
8.6
通讯作者：
Brandes, T.
中科院分区：
文献类型：
--
作者：
Bastidas, V. M.;Emary, C.;Brandes, T.
通过考虑原子-光场耦合的单色非绝热调制，我们在Dicke模型中建立了一组非平衡量子相变。对于弱驱动，系统显示了一组边带，这允许绕过禁止超辐射相变发生的禁止定理。在强驱动下，系统呈现出丰富的多稳态结构，并表现出一阶和二阶非平衡量子相变。
We establish a set of nonequilibrium quantum phase transitions in the Dicke model by considering a monochromatic nonadiabatic modulation of the atom-field coupling. For weak driving the system exhibits a set of sidebands which allow the circumvention of the no-go theorem which otherwise forbids the occurrence of superradiant phase transitions. At strong driving we show that the system exhibits a rich multistable structure and exhibits both first- and second-order nonequilibrium quantum phase transitions.