Long-range photon-mediated gate scheme between nuclear spin qubits in diamond

Auer, Adrian; Burkard, Guido

Long-range photon-mediated gate scheme between nuclear spin qubits in diamond

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Date

2016

Publication type

Journal article

Publication status

Published

Published in

Physical Review B ; 93 (2016), 3. - 035402. - ISSN 2469-9950. - eISSN 2469-9969

Abstract

Defect centers in diamond are exceptional solid-state quantum systems that can have exceedingly long electron and nuclear spin coherence times. So far, single-qubit gates for the nitrogen nuclear spin, a two-qubit gate with a nitrogen-vacancy (NV) center electron spin, and entanglement between nearby nitrogen nuclear spins have been demonstrated. Here, we develop a scheme to implement a universal two-qubit gate between two distant nitrogen nuclear spins. Virtual excitation of an NV center that is embedded in an optical cavity can scatter a laser photon into the cavity mode; we show that this process depends on the nuclear spin state of the nitrogen atom. If two NV centers are simultaneously coupled to a common cavity mode and individually excited, virtual cavity photon exchange can mediate an effective interaction between the nuclear spin qubits, conditioned on the spin state of both nuclei, which implements a universal controlled-Z gate. We predict operation times below 10μs, which is four orders of magnitude faster than the decoherence time of nuclear spin qubits in diamond.

Subject (DDC)

530 Physics

Cite This

ISO 690

AUER, Adrian, Guido BURKARD, 2016. Long-range photon-mediated gate scheme between nuclear spin qubits in diamond. In: Physical Review B. 93(3), 035402. ISSN 2469-9950. eISSN 2469-9969. Available under: doi: 10.1103/PhysRevB.93.035402

BibTex

@article{Auer2016Longr-33409,
  year={2016},
  doi={10.1103/PhysRevB.93.035402},
  title={Long-range photon-mediated gate scheme between nuclear spin qubits in diamond},
  number={3},
  volume={93},
  issn={2469-9950},
  journal={Physical Review B},
  author={Auer, Adrian and Burkard, Guido},
  note={Article Number: 035402}
}

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