Strong coupling of a spin qubit to a superconducting stripline cavity

2012/04/30 by Xuedong Hu, Yu-xi Liu, Franco Nori · 1 citation
Physics and Astronomy · #cond-mat.mes-hall #quant-ph

paper · pdf · doi:10.1103/physrevb.86.035314

published as Phys. Rev. B 86, 035314 (2012) · 6 pages, 2 figures. Published version

arxiv created 2012/09/04 · arxiv updated 2012/09/05

Abstract

We study electron-spin-photon coupling in a single-spin double quantum dot embedded in a superconducting stripline cavity. With an external magnetic field, we show that either a spin-orbit interaction (for InAs) or an inhomogeneous magnetic field (for Si and GaAs) could produce a strong spin-photon coupling, with a coupling strength of the order of 1 MHz. With an isotopically purified Si double dot, which has a very long spin coherence time for the electron, it is possible to reach the strong-coupling limit between the spin and the cavity photon, as in cavity quantum electrodynamics. The coupling strength and relaxation rates are calculated based on parameters of existing devices, making this proposal experimentally feasible.

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