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arXiv quant-ph/0604097quant-ph
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广义Dicke模型的量子临界性

Quantum criticality in a generalized Dicke model

Yong Li, Z. D. Wang, C. P. Sun

摘要:

本文采用广义Dicke模型,从理论上研究了扩展二能级原子系综与单模量子化光场相互作用系统的量子临界性。有效的哈密顿量的推导和对角化的数值研究其本征频率为不同的量子相位的系统。基于对本征频率的分析,我们清楚地揭示了从正常相到超辐射相的一个有趣的量子相变,这与用标准Dicke模型观察到的相变有很大的不同.

英文摘要:

We employ a generalized Dicke model to study theoretically the quantum criticality of an extended two-level atomic ensemble interacting with a single-mode quantized light field. Effective Hamiltonians are derived and diagonalized to investigate numerically their eigenfrequencies for different quantum phases in the system. Based on the analysis of the eigenfrequencies, an intriguing quantum-phase transition from a normal phase to a superradiant phase is revealed clearly, which is quite different from that observed with a standard Dicke model.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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