Coalescence of Single Photons Emitted by Disparate Single-Photon Sources: The Example of InAs Quantum Dots and Parametric Down-Conversion Sources

Sergey V. Polyakov, Andreas Muller, Edward B. Flagg, Alex Ling, Natalia Borjemscaia, Edward Van Keuren, Alan Migdall, and Glenn S. Solomon
Phys. Rev. Lett. 107, 157402 – Published 5 October 2011

Abstract

Single photons produced by fundamentally dissimilar physical processes will in general not be indistinguishable. We show how photons produced from a quantum dot and by parametric down-conversion in a nonlinear crystal can be manipulated to be indistinguishable. The measured two-photon coalescence probability is 16%, and is limited by quantum-dot decoherence. Temporal filtering to the quantum-dot coherence time and accounting for detector time response increases this to 61% while retaining 25% of the events. This technique can connect different elements in a scalable quantum network.

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  • Received 24 October 2010

DOI:https://doi.org/10.1103/PhysRevLett.107.157402

Published by the American Physical Society

Authors & Affiliations

Sergey V. Polyakov1, Andreas Muller1,*, Edward B. Flagg1, Alex Ling1,†, Natalia Borjemscaia1,2, Edward Van Keuren2, Alan Migdall1, and Glenn S. Solomon1,‡

  • 1Joint Quantum Institute, National Institute of Standards and Technology and University of Maryland, Gaithersburg, Maryland, USA
  • 2Physics Department, Georgetown University, Washington, D.C., USA

  • *Current address: Department of Physics, University of South Florida, Tampa, FL, USA.
  • Current address: Centre for Quantum Technologies, Singapore 117543.
  • Corresponding author. glenn.solomon@nist.gov

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Issue

Vol. 107, Iss. 15 — 7 October 2011

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