Electron spins and photons are complementary quantum-mechanical objects that can be used to carry, manipulate and transform quantum information. To combine these resources, it is desirable to achieve the coherent coupling of a single spin to photons stored in a superconducting resonator. Using a circuit design based on a nanoscale spin-valve, we coherently hybridize the individual spin and charge states of a double quantum dot while preserving spin coherence. This scheme allows us to achieve spin-photon coupling up to the MHz range at the single spin level. The cooperativity is found to reach 2.3, and the spin coherence time is about 60ns. We thereby demonstrate a mesoscopic device suitable for non-destructive spin read-out and distant spin coupling.
@article{arxiv.1509.03839,
title = {Coherent coupling of a single spin to microwave cavity photons},
author = {J. J. Viennot and M. C. Dartiailh and A. Cottet and T. Kontos},
journal= {arXiv preprint arXiv:1509.03839},
year = {2015}
}