Abstract
We propose and analyze a hybrid device by integrating a microscale diamond beam with a single built-in nitrogen-vacancy () center spin to a superconducting coplanar waveguide (CPW) cavity. We find that under an ac electric field the quantized motion of the diamond beam can strongly couple to the single cavity photons via a dielectric interaction. Together with the strong spin-motion interaction via a large magnetic-field gradient, it provides a hybrid quantum device where the diamond resonator can strongly couple both to the single microwave-cavity photons and to the single center spin. This enables coherent information transfer and effective coupling between the spin and the CPW cavity via mechanically dark polaritons. This hybrid spin-electromechanical device, with tunable couplings by external fields, offers a realistic platform for implementing quantum information with single spins, diamond mechanical resonators, and single microwave photons.
- Received 25 August 2014
DOI:https://doi.org/10.1103/PhysRevApplied.4.044003
© 2015 American Physical Society