We note that the all-optical switching schemes are based on electromagnetically induced transparency. In this paper, we will study the optical switching based on another mechanism, i.e., local single-excitation resonance. The average-photon-number distribution in the steady state is studied in a system of two linearly coupled cavities, where one of cavity includs a two-level atom inside, and the cavity without the atom is driven by a classical light field. We find that the steady-state average-photon-number distribution of the two cavities can be controlled, which means that our scheme can be used as a quantum optical switching. Our finding may has potential application in quantum information and quantum computation.

中文翻译：

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基于局部单激发谐振的量子光开关

我们注意到全光开关方案基于电磁感应透明度。在本文中，我们将研究基于另一种机制的光开关，即局部单激发共振。在两个线性耦合腔系统中研究稳态平均光子数分布，其中一个腔内部包含一个两能级原子，而没有原子的腔由经典光场驱动。我们发现两个腔的稳态平均光子数分布是可以控制的，这意味着我们的方案可以用作量子光开关。我们的发现可能在量子信息和量子计算中具有潜在的应用。