cff-version: 1.2.0
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."
authors:
  - family-names: Tchebotareva
    given-names: A. (Anna)
  - family-names: Hermans
    given-names: Sophie
    orcid: "https://orcid.org/0000-0002-1060-5199"
  - family-names: Hanson
    given-names: R. (Ronald)
    orcid: "https://orcid.org/0000-0001-8938-2137"
title: "Supporting data for Entanglement between a Diamond Spin Qubit and a Photonic Time-Bin Qubit at Telecom Wavelength"
keywords:
version: 1
identifiers:
  - type: doi
    value: 10.4121/uuid:b0b73eda-f654-49d1-a5bc-5896c8016502
license: CC0
date-released: 2020-04-30