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arXiv 1607.05062quant-ph
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深强耦合区光子阻塞的命运

Fate of photon blockade in the deep strong coupling regime

Alexandre Le Boité, Myung-Joong Hwang, Hyunchul Nha, Martin B. Plenio

摘要:

我们研究了驱动耗散Rabi模型在所谓的超强和深强耦合区中的光子发射特性,在这种耦合区中,原子-腔耦合率$g$变得与腔频率$ω_c$相当或更大.通过数值求解缀饰态基下的主方程,我们计算了在较宽耦合率范围内的稳态输出场关联函数。我们发现,随着原子-腔耦合强度的增加,系统的光子统计经历了多次跃迁。特别是,第一个尖锐的反聚束到聚束过渡,发生在$g\sim0.45ω_c$,导致由于反向旋转条款的光子封锁的崩溃,被证明是在能谱中的奇偶移位的后果。随后复苏的光子封锁和出现的准相干统计,甚至更大的耦合率,是由于在能量谱和之间的过渡率的非线性之间的相互作用的装扮状态。

英文摘要:

We investigate the photon emission properties of the driven-dissipative Rabi model in the so-called ultrastrong and deep strong coupling regimes, where the atom-cavity coupling rate $g$ becomes comparable or larger than the cavity frequency $ω_c$. By solving numerically the master equation in the dressed-state basis, we compute the output field correlation functions in the steady-state for a wide range of coupling rates. We find that, as the atom-cavity coupling strength increases, the system undergoes multiple transitions in the photon statistics. In particular, a first sharp anti-bunching to bunching transition, occurring at $g\sim0.45ω_c$, leading to the breakdown of the photon blockade due to the counter-rotating terms, is shown to be the consequence of a parity shift in the energy spectrum. A subsequent revival of the photon blockade and the emergence of the quasi-coherent statistics, for even larger coupling rates, are attributed to an interplay between the nonlinearity in the energy spectrum and the transition rates between the dressed states.

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