Loss-induced suppression, revival, and switch of photon blockade
Loss-induced suppression, revival, and switch of photon blockade
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DOI：
10.1103/physreva.106.043715
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发表时间：
2022-10
影响因子：
2.9
通讯作者：
Y. Zuo;Ran Huang;L. Kuang;Xun-Wei Xu;H. Jing
中科院分区：
文献类型：
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作者：
Y. Zuo;Ran Huang;L. Kuang;Xun-Wei Xu;H. Jing
损耗诱导透明（LIT）在经典光学中得到了证明，其特点是通过增加损耗而使光强恢复。然而，一个基本的问题仍然没有被探索，即在LIT的过程中，光子的量子相关性是否也可以通过增加损失来恢复甚至调整。本研究发现，在非线性光分子系统中，伴随经典的光子阻滞（PB）的纯量子效应确实可以在损失的帮助下恢复。特别是，系统中出现了一个量子临界点：在该临界点以下，增加损耗导致光强及其相关性受到抑制；相反，超过这个点，PB就会恢复和增强，损失也会增加。此外，单pb和双pb之间的量子切换可以通过简单地调整损耗来实现。我们的工作提供了一种在实际损耗环境中设计量子器件的反直觉策略。
Loss-induced transparency (LIT), featuring the revival of optical intensity by adding loss, has been demonstrated in classical optics. However, a fundamental question has remained unexplored, i.e., during the process of LIT, whether quantum correlations of the photons can also be revived or even tuned by increasing the loss. Here we find that, accompanying classical LIT in a nonlinear optical-molecule system, a purely quantum effect as photon blockade (PB) indeed can be revived with the help of loss. In particular, a quantum critical point emerges in the system: below the point, adding loss leads to the suppression of optical intensity and its correlations; in contrast, by surpassing the point, PB is revived and enhanced with more losses. Also, a quantum switch between single-PB and two-PB can be realized by simply tuning the loss. Our work provides a counterintuitive strategy to engineer quantum devices in a practical lossy environment.