Spin–optical interfaces
Optical photons can carry quantum information over long distances.
$$P_{\rm emit}\propto\frac{\Gamma_{\rm guided}}{\Gamma_{\rm total}}$$
Physical intuition
Optical photons can carry quantum information over long distances.
Deep dive: physical mechanism
Selection rules and optical cavities map localized spins to emitted photons in suitable emitters.
What is measured experimentally?
Photon indistinguishability and spin–photon correlations test the interface.
Assumptions, noise and limitations
Most silicon gate-defined spin qubits lack a direct strong optical transition.
Research and simulation exercise
Calculate collection efficiency from competing decay rates.
Connect the ideas
Explore the chapter overview, learning path, and references.