Entanglement between a diamond spin qubit and a photonic time-bin qubit at telecom wavelength

Anna Tchebotareva; Sophie L. N. Hermans; Peter C. Humphreys; Dirk Voigt; Peter J. Harmsma; Lun K. Cheng; Ad L. Verlaan; Niels Dijkhuizen; Wim de Jong; Anaïs Dréau; Ronald Hanson

doi:10.1103/PhysRevLett.123.063601

Entanglement between a diamond spin qubit and a photonic time-bin qubit at telecom wavelength

Quantum Physics 2019-08-14 v1

Authors: Anna Tchebotareva , Sophie L. N. Hermans , Peter C. Humphreys , Dirk Voigt , Peter J. Harmsma , Lun K. Cheng , Ad L. Verlaan , Niels Dijkhuizen , Wim de Jong , Anaïs Dréau , Ronald Hanson

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Abstract

We report on the realization and verification of quantum entanglement between an NV electron spin qubit and a telecom-band photonic qubit. First we generate entanglement between the spin qubit and a 637 nm photonic time-bin qubit, followed by photonic quantum frequency conversion that transfers the entanglement to a 1588 nm photon. We characterize the resulting state by correlation measurements in different bases and find a lower bound to the Bell state fidelity of F = 0.77 +/- 0.03. This result presents an important step towards extending quantum networks via optical fiber infrastructure.

Keywords

quantum entanglement nv center spin qubit photonic qubit time-bin qubit quantum frequency conversion quantum network

Cite

@article{arxiv.1905.08676,
  title  = {Entanglement between a diamond spin qubit and a photonic time-bin qubit at telecom wavelength},
  author = {Anna Tchebotareva and Sophie L. N. Hermans and Peter C. Humphreys and Dirk Voigt and Peter J. Harmsma and Lun K. Cheng and Ad L. Verlaan and Niels Dijkhuizen and Wim de Jong and Anaïs Dréau and Ronald Hanson},
  journal= {arXiv preprint arXiv:1905.08676},
  year   = {2019}
}

Entanglement between a diamond spin qubit and a photonic time-bin qubit at telecom wavelength

Abstract

Keywords

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