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Strong spin-photon coupling in silicon

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Science  09 Mar 2018:
Vol. 359, Issue 6380, pp. 1123-1127
DOI: 10.1126/science.aar4054

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Coupling light to single spins

To help develop quantum circuits, much effort has been directed toward achieving the strong-coupling regime by using gate-defined semiconductor quantum dots. Potentially, the magnetic dipole, or spin, of a single electron for use as a qubit has advantages over charge-photon coupling owing to its longer lifetime. Samkharadze et al. hybridized the electron spin with the electron charge in a double silicon quantum dot. This approach yielded strong coupling between the single electron spin and a single microwave photon, providing a route to scalable quantum circuits with spin qubits.

Science, this issue p. 1123