Aguayo-Alvarado A L, Domínguez-Serna F, Cruz W De La, Garay-Palmett K
Departamento de Óptica - Centro de Investigación Científica y de Educación Superior de, Ensenada, BC, 22860, México.
Cátedras Conacyt - Centro de Investigación Científica y de Educación Superior de, Ensenada, B.C., 22860, México.
Sci Rep. 2022 Mar 25;12(1):5154. doi: 10.1038/s41598-022-09116-w.
This work presents a feasible design of an integrated photonic circuit performing as a device for single-qubit preparation and rotations through the third-order nonlinear process of difference frequency generation (DFG) and defined in the temporal mode basis. The first stage of our circuit includes the generation of heralded single photons by spontaneous four-wave mixing in a micro-ring cavity engineered for delivering a single-photon state in a unique temporal mode. The second stage comprises the implementation of DFG in a spiral waveguide with controlled dispersion properties for reaching color qubit preparation fidelity close to unity. We present the generalized rotation operator related to the DFG process, a methodology for the device design, and qubit preparation fidelity results as a function of user-accessible parameters.
这项工作提出了一种集成光子电路的可行设计，该电路通过差频产生（DFG）的三阶非线性过程作为单量子比特制备和旋转的器件，并在时间模式基础上进行定义。我们电路的第一阶段包括通过在微环腔中自发四波混频产生预示单光子，该微环腔经过设计，可在独特的时间模式下传递单光子态。第二阶段包括在具有可控色散特性的螺旋波导中实现DFG，以达到接近单位的颜色量子比特制备保真度。我们给出了与DFG过程相关的广义旋转算符、器件设计方法以及作为用户可访问参数函数的量子比特制备保真度结果。
