We propose an integrated photonics device for mapping qubits encoded in the polarization of a photon onto the spin state of a solid-state defect coupled to a photonic crystal cavity: a “polarization-encoded photon-to-spin interface” (PEPSI). We perform a theoretical analysis of the state fidelity’s dependence on the device’s polarization extinction ratio and atom–cavity cooperativity. Furthermore, we explore the rate-fidelity trade-off through analytical and numerical models. In simulation, we show that our design enables efficient, high fidelity photon-to-spin mapping.

中文翻译：

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极化编码的光子自旋接口

我们提出了一种集成的光子学设备，用于将在光子的偏振态中编码的量子位映射到耦合到光子晶体腔的固态缺陷的自旋态上：“偏振编码的光子-自旋界面”（PEPSI）。我们对状态保真度依赖于器件的偏振消光比和原子-腔合作性进行了理论分析。此外，我们通过分析和数值模型探索了速率保真度的权衡。在仿真中，我们表明我们的设计实现了高效，高保真度的光子到自旋映射。