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arXiv 2103.07402quant-phphysics.atom-ph
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坏腔Laser中的次辐射-次辐射相变

Subradiant-to-Subradiant Phase Transition in the Bad Cavity Laser

Athreya Shankar, Jarrod T. Reilly, Simon B. Jäger, Murray J. Holland

摘要:

我们证明了在坏腔激光器中稳态超辐射的出现之前,在稳态亚辐射的两个不同相位之间存在耗散相变。这种转变的特征是腔输出功率和平均原子反转的非解析行为,以及集体原子反转方差的不连续性。特别地,对于低于临界值的再泵浦速率,腔输出功率被强烈抑制,并且不随原子数增加,而当原子数高于该值时,腔输出功率与原子数成线性比例。值得注意的是,我们发现,原子是在一个宏观纠缠的临界区域附近的稳定状态与消失的分数的非纠缠原子的大原子数限制。

英文摘要:

We show that the onset of steady-state superradiance in a bad cavity laser is preceded by a dissipative phase transition between two distinct phases of steady-state subradiance. The transition is marked by a non-analytic behavior of the cavity output power and the mean atomic inversion, as well as a discontinuity in the variance of the collective atomic inversion. In particular, for repump rates below a critical value, the cavity output power is strongly suppressed and does not increase with the atom number, while it scales linearly with atom number above this value. Remarkably, we find that the atoms are in a macroscopic entangled steady state near the critical region with a vanishing fraction of unentangled atoms in the large atom number limit.

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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