Entanglement between a Diamond Spin Qubit and a Photonic Time-Bin Qubit at Telecom Wavelength.

Autor:	Tchebotareva A; QuTech, Delft University of Technology, P.O. Box 5046, 2600 GA Delft, Netherlands.; Netherlands Organisation for Applied Scientific Research (TNO), P.O. Box 155, 2600 AD Delft, Netherlands., Hermans SLN; QuTech, Delft University of Technology, P.O. Box 5046, 2600 GA Delft, Netherlands.; Kavli Institute of Nanoscience, Delft University of Technology, P.O. Box 5046, 2600 GA Delft, Netherlands., Humphreys PC; QuTech, Delft University of Technology, P.O. Box 5046, 2600 GA Delft, Netherlands.; Kavli Institute of Nanoscience, Delft University of Technology, P.O. Box 5046, 2600 GA Delft, Netherlands., Voigt D; QuTech, Delft University of Technology, P.O. Box 5046, 2600 GA Delft, Netherlands.; Netherlands Organisation for Applied Scientific Research (TNO), P.O. Box 155, 2600 AD Delft, Netherlands., Harmsma PJ; QuTech, Delft University of Technology, P.O. Box 5046, 2600 GA Delft, Netherlands.; Netherlands Organisation for Applied Scientific Research (TNO), P.O. Box 155, 2600 AD Delft, Netherlands., Cheng LK; QuTech, Delft University of Technology, P.O. Box 5046, 2600 GA Delft, Netherlands.; Netherlands Organisation for Applied Scientific Research (TNO), P.O. Box 155, 2600 AD Delft, Netherlands., Verlaan AL; QuTech, Delft University of Technology, P.O. Box 5046, 2600 GA Delft, Netherlands.; Netherlands Organisation for Applied Scientific Research (TNO), P.O. Box 155, 2600 AD Delft, Netherlands., Dijkhuizen N; QuTech, Delft University of Technology, P.O. Box 5046, 2600 GA Delft, Netherlands.; Netherlands Organisation for Applied Scientific Research (TNO), P.O. Box 155, 2600 AD Delft, Netherlands., de Jong W; QuTech, Delft University of Technology, P.O. Box 5046, 2600 GA Delft, Netherlands.; Netherlands Organisation for Applied Scientific Research (TNO), P.O. Box 155, 2600 AD Delft, Netherlands., Dréau A; QuTech, Delft University of Technology, P.O. Box 5046, 2600 GA Delft, Netherlands.; Kavli Institute of Nanoscience, Delft University of Technology, P.O. Box 5046, 2600 GA Delft, Netherlands.; Laboratoire Charles Coulomb, Université de Montpellier and CNRS, 34095 Montpellier, France., Hanson R; QuTech, Delft University of Technology, P.O. Box 5046, 2600 GA Delft, Netherlands.; Kavli Institute of Nanoscience, Delft University of Technology, P.O. Box 5046, 2600 GA Delft, Netherlands.
Jazyk:	angličtina
Zdroj:	Physical review letters [Phys Rev Lett] 2019 Aug 09; Vol. 123 (6), pp. 063601.
DOI:	10.1103/PhysRevLett.123.063601
Abstrakt:	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.
Databáze:	MEDLINE
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