We achieve a spin-photon coupling rate as large as gs/2π = 10 MHz, which exceeds both the cavity decay rate κ/2π = 1.8 MHz and spin dephasing rate γ/2π = 2.4 MHz, firmly anchoring our system in the strong-coupling regime. Vacuum Rabi splitting is observed in the cavity transmission as the Zeeman splitting of a single spin is tuned into resonance with the cavity photon. Here we combine a large electric-dipole interaction with spin-orbit coupling to achieve spin-photon coupling. However, this isolation comes with a cost, as it is difficult to coherently couple two spins in the solid state, especially when they are separated by a large distance. Jason Petta, Professor of Physics, Princeton UniversityĮlectron spins are excellent candidates for solid state quantum computing due to their exceptionally long quantum coherence times, which is a result of weak coupling to environmental degrees of freedom. Spinning up a silicon-based quantum processor ( video)
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