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

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...

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Veröffentlicht in:arXiv.org 2019-05
Hauptverfasser: Tchebotareva, Anna, Hermans, Sophie L N, Humphreys, Peter C, Voigt, Dirk, Harmsma, Peter J, Cheng, Lun K, Verlaan, Ad L, Dijkhuizen, Niels, de Jong, Wim, Dréau, Anaïs, Hanson, Ronald
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Sprache:eng
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Zusammenfassung: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.
ISSN:2331-8422
DOI:10.48550/arxiv.1905.08676