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Hybrid Quantum Device Based on NV Centers in Diamond Nanomechanical Resonators Plus Superconducting Waveguide Cavities

Peng-Bo Li, Yong-Chun Liu, S.-Y. Gao, Ze-Liang Xiang, Peter Rabl, Yun-Feng Xiao, and Fu-Li Li
Phys. Rev. Applied 4, 044003 – Published 8 October 2015

Abstract

We propose and analyze a hybrid device by integrating a microscale diamond beam with a single built-in nitrogen-vacancy (NV) 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 NV center spin. This enables coherent information transfer and effective coupling between the NV 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 NV spins, diamond mechanical resonators, and single microwave photons.

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  • Received 25 August 2014

DOI:https://doi.org/10.1103/PhysRevApplied.4.044003

© 2015 American Physical Society

Authors & Affiliations

Peng-Bo Li1, Yong-Chun Liu2, S.-Y. Gao1, Ze-Liang Xiang3, Peter Rabl3, Yun-Feng Xiao2, and Fu-Li Li1

  • 1Department of Applied Physics, Institute of Quantum Optics and Quantum Information, Xi’an Jiaotong University, Xi’an 710049, China
  • 2State Key Laboratory for Mesoscopic Physics, School of Physics, Peking University; Collaborative Innovation Center of Quantum Matter, Beijing 100871, China
  • 3Institute of Atomic and Subatomic Physics, TU Wien, Stadionallee 2, 1020 Wien, Austria

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Vol. 4, Iss. 4 — October 2015

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