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arXiv 2011.12120quant-phcond-mat.quant-gas
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U(1)对称腔QED模型的纯原子理论

Atom-only theories for U(1) symmetric cavity-QED models

Roberta Palacino, Jonathan Keeling

摘要:

我们考虑一个具有U(1)对称性的广义Dicke模型,它可以跃迁到自发打破这种对称性的超辐射态。通过利用原子和腔动力学之间的时间尺度差异,人们可以消除腔动力学,提供一个原子理论。我们表明,标准的Redfield理论不能描述的过渡到超辐射态,但包括高阶修正恢复过渡。我们的工作揭示了如何有效的理论形式必须与连续对称的模型不同,并提供了一个模板,以开发更复杂的模型的有效理论。

英文摘要:

We consider a generalized Dicke model with U(1) symmetry, which can undergo a transition to a superradiant state that spontaneously breaks this symmetry. By exploiting the difference in timescale between atomic and cavity dynamics, one may eliminate the cavity dynamics, providing an atom-only theory. We show that the standard Redfield theory cannot describe the transition to the superradiant state, but including higher-order corrections does recover the transition. Our work reveals how the forms of effective theories must vary for models with continuous symmetry, and provides a template to develop effective theories of more complex models.

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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