Nonreciprocal quantum-state conversion between microwave and optical photons
Nonreciprocal quantum-state conversion between microwave and optical photons
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DOI：
10.1103/physreva.96.013808
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发表时间：
2016-10
影响因子：
2.9
通讯作者：
L. Tian;Zhen Li
中科院分区：
文献类型：
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作者：
L. Tian;Zhen Li
在混合量子网络中，光机量子接口可以用来连接具有截然不同频率的系统。在这里，我们提出了一种通过光机接口实现微波和光学光子之间的非互易量子态转换的方案。通过引入辅助腔和控制线性化光机耦合之间的相位差，可以实现单向状态传输。该接口可用作隔离器、环行器和双向开关，将输入状态路由至选定的输出通道。我们证明了在广义阻抗匹配条件下，状态转换可以达到高保真，并且对机械模式中的热涨落具有很强的抵抗力。
Optomechanical quantum interfaces can be utilized to connect systems with distinctively different frequencies in hybrid quantum networks. Here we present a scheme of nonreciprocal quantum state conversion between microwave and optical photons via an optomechanical interface. By introducing an auxiliary cavity and manipulating the phase differences between the linearized optomechanical couplings, uni-directional state transmission can be achieved. The interface can function as an isolator, a circulator, and a two-way switch that routes the input states to a selected output channel. We show that under a generalized impedance matching condition, the state conversion can reach high fidelity and is robust against the thermal fluctuations in the mechanical mode.