Quantum random walks (QRWs) are random processes in which the resulting probability density of the "walker" state, whose movement is governed by a "coin" state, is described in a nonclassical manner. Previously, Q-plates have been used to demonstrate QRWs with polarization and orbital angular momentum playing the roles of coin and walker states, respectively. In this theoretical analysis, we show how stress-engineered optics can be used to develop new platforms for complex QRWs through relatively simple optical elements. Our work opens up new paths to speed up classical-to-quantum transitions in robust photonic networks.

中文翻译：

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用应力工程光学对量子随机游走进行理论分析。

量子随机游走（QRWs）是随机过程，其中以非经典方式描述了其运动受“硬币”状态支配的“行者”状态的最终概率密度。以前，Q板用于演示极化和轨道角动量分别扮演硬币和沃克状态的QRW。在此理论分析中，我们展示了如何通过相对简单的光学元件将应力工程光学元件用于开发复杂QRW的新平台。我们的工作开辟了新的途径，以加快健壮的光子网络中从经典到量子的跃迁。