2019/05/02 by F. Borjans, X. G. Croot, X. Mi +2 · 2 citations
Computer Science · Physics and Astronomy · #Cavity quantum electrodynamics #Coupling (piping) #Mechanical and Optical Resonators #Photon #Quantum Information and Cryptography #Quantum and electron transport phenomena #Quantum computer #Quantum entanglement #Quantum information #Qubit #Spin (aerodynamics) #Spins #cond-mat.mes-hall #quant-ph
paper · pdf · doi:10.1038/s41586-019-1867-y
published as Nature 577, 195 (2020)
arxiv created 2019/05/02 · openalex publication_date 2019/12/25 · openalex created_date 2020/01/10 · arxiv updated 2020/03/04 · openalex updated_date 2026/08/05
Entangling gates for electron spins in semiconductor quantum dots are generally based on exchange, a short-ranged interaction that requires wavefunction overlap. Coherent spin-photon coupling raises the prospect of using photons as long-distance interconnects for spin qubits. Realizing a key milestone for spin-based quantum information processing, we demonstrate microwave-mediated spin-spin interactions between two electrons that are physically separated by more than 4 mm. Coherent spin-photon coupling is demonstrated for each individual spin using microwave transmission spectroscopy. An enhanced vacuum Rabi splitting is observed when both spins are tuned into resonance with the cavity, indicative of a coherent spin-spin interaction. Our results demonstrate that microwave-frequency photons can be used as a resource to generate long-range two-qubit gates between spatially separated spins.