npj Quantum Information (Jan 2021)

A polarization encoded photon-to-spin interface

  • K. C. Chen,
  • E. Bersin,
  • D. Englund

DOI
https://doi.org/10.1038/s41534-020-00337-3
Journal volume & issue
Vol. 7, no. 1
pp. 1 – 6

Abstract

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Abstract 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.