Title
Telecom-Band Quantum Interference of Frequency-Converted Photons from Remote Detuned NV Centers
Author
Stolk, A.J.
van der Enden, K.L.
Roehsner, M.C.
Teepe, A.
Faes, S.O.F.
Bradley, C.E.
Cadot, S.
van Rantwijk, J.
te Raa, I.
Hagen, R.A.J.
Verlaan, A.L.
Biemond, J.J.B.
Khorev, A.
Vollmer, R.
Markham, M.
Edmonds, A.M.
Morits, J.P.J.
Taminiau, T.H.T.
van Zwet, E.J.
Hanson, R.
Publication year
2022
Abstract
Entanglement distribution over quantum networks has the promise of realizing fundamentally new technologies. Entanglement between separated quantum processing nodes has been achieved on several experimental platforms in the past decade. To move toward metropolitan-scale quantum network test beds, the creation and transmission of indistinguishable single photons over existing telecom infrastructure is key. Here, we report the interference of photons emitted by remote spectrally detuned NV-centerbased network nodes, using quantum frequency conversion to the telecom L band. We find a visibility of 0.79 ± 0.03 and an indistinguishability between converted NV photons around 0.9 over the full range of the emission duration, confirming the removal of the spectral information present. Our approach implements fully separated and independent control over the nodes, time multiplexing of control and quantum signals, and active feedback to stabilize the output frequency. Our results demonstrate a working principle that can be readily employed on other platforms and shows a clear path toward generating metropolitan-scale solid-state entanglement over deployed telecom fibers.
Subject
Quantum entanglement
Detuned
Entanglement distribution
Experimental platform
Network test
NV center
Processing nodes
Quantum interference
Quantum network
Telecom bands
Test bed
Photons
High Tech Systems & Materials
Industrial Innovation
To reference this document use:
http://resolver.tudelft.nl/uuid:9a990d0a-2248-4eb0-8ad4-17ff6b62a65d
DOI
https://doi.org/10.1103/prxquantum.3.020359
TNO identifier
973201
Publisher
American Physical Society APS
ISSN
2691-3399
Source
PRX Quantum, 3 (3)
Document type
article