Title
Entanglement between a Diamond Spin Qubit and a Photonic Time-Bin Qubit at Telecom Wavelength
Author
Tchebotareva, A.
Hermans, S.L.N.
Humphreys, P.C.
Voigt, D.
Harmsma, P.J.
Cheng, L.K.
Verlaan, A.L.
Dijkhuizen, N.
de Jong, W.
Dréau, A.
Hanson, R.
Publication year
2019
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
Subject
High Tech Systems & Materials
Industrial Innovation
Nonlinear optics
Optical quantum information processing
Quantum entanglement
Quantum networks
Communication networks
Photon pairs
Parametric down-conversion
Electronics
To reference this document use:
http://resolver.tudelft.nl/uuid:145d0f3c-6e5a-4542-8288-481156908562
TNO identifier
868576
Publisher
American Physical Society APS, Ridge, NY, US
ISSN
0031-9007
Source
Physical review letters, 123
Document type
article