1. Entanglement between a Diamond Spin Qubit and a Photonic Time-Bin Qubit at Telecom Wavelength.
- Author
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Tchebotareva, Anna, Hermans, Sophie L. N., Humphreys, Peter C., Voigt, Dirk, Harmsma, Peter J., Cheng, Lun K., Verlaan, Ad L., Dijkhuizen, Niels, Wim de Jong, Dréau, Anaïs, and Hanson, Ronald
- Subjects
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OPTICAL fiber networks , *QUANTUM entanglement , *ELECTRON spin , *BOUND states , *BELL'S theorem , *TELECOMMUNICATION , *SPIN-spin interactions - Abstract
We report on the realization and verification of quantum entanglement between a nitrogen-vacancy 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 = 0.77 ± 0.03. This result presents an important step towards extending quantum networks via optical fiber infrastructure. [ABSTRACT FROM AUTHOR]
- Published
- 2019
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