Microwave to Optical quantum transduction.

超导量子电路真正有用的应用需要几台计算机联网在一起。在这些系统中，量子信息通过微波频率电磁波（EM）传输。这些信号频率在室温下通过导线远距离传播是不切实际的，因为趋肤效应、导线绝缘造成的介电损耗和困难的阻抗匹配条件。光纤已被提出作为一种高速、低损耗的解决方案来连接多个量子比特系统[1]、[2]，包括超导量子比特[3]。实现该网络的一个主要障碍是需要将微波信号的GHz频段转换为太赫兹区域的光频段。因此，需要一种单位效率的微波光换能器。

Truly useful applications of superconducting quantum circuits requires networking of several computers together. In these systems the quantum information is transmitted via microwave frequency electromagnetic (EM) waves. Propagation of these signal frequencies through wires across large distances at room temperature is impractical due to the skin effect, dielectric losses from wire insulation and difficult impedance matching conditions. Optical fibres have been proposed as a high speed and low loss solution to networking many qubit systems [1], [2], including superconducting qubits [3]. A major roadblock for the implementation of this network is the need to convert between the GHz frequency band of microwave signals to the optical band in the THz region. There is, therefore, a need for unity efficiency microwave to optical transducers.