Details

Autor(en) / Beteiligte

• Harvey-Collard, Patrick
• Dijkema, Jurgen
• Zheng, Guoji
• Sammak, Amir
• Scappucci, Giordano
• Vandersypen, Lieven M. K.

Titel

Coherent Spin-Spin Coupling Mediated by Virtual Microwave Photons

Ist Teil von

• Physical review. X, 2022-05, Vol.12 (2), p.021026, Article 021026

Ort / Verlag

College Park: American Physical Society

Erscheinungsjahr

2022

Link zum Volltext

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• We report the coherent coupling of two electron spins at a distance via virtual microwave photons. Each spin is trapped in a silicon double quantum dot at either end of a superconducting resonator, achieving spin-photon couplings up to aroundgs/2π=40MHz. As the two spins are brought into resonance with each other, but detuned from the photons, an avoided crossing larger than the spin linewidths is observed with an exchange splitting around2J/2π=20MHz. In addition, photon-number states are resolved from the shift2χs/2π=−13MHzthat they induce on the spin frequency. These observations demonstrate that we reach the strong dispersive regime of circuit quantum electrodynamics with spins. Achieving spin-spin coupling without real photons is essential to long-range two-qubit gates between spin qubits and scalable networks of spin qubits on a chip.