论文标题
通过三阶非线性相互作用进行颜色量子量子准备的集成光子电路
An integrated photonic circuit for color qubit preparation by third-order nonlinear interactions
论文作者
论文摘要
这项工作介绍了一个集成的光子电路作为单量器制备的设备的可行设计，并通过差异频率产生（DFG）的三阶非线性过程（DFG）进行旋转，并在时间模式为基础上定义。我们电路的第一阶段包括在微型环腔中自发的四波混合，以独特的时间模式传递单光子状态，从而产生了预示的单光子。第二阶段包括在螺旋波导中的实现，具有受控分散性能，以达到接近统一的颜色量子量子准备忠诚度。我们介绍了与DFG过程有关的广义旋转操作员，该过程是设备设计的方法，量子准备忠诚度结果是用户访问参数的函数。
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.
