Polyakov, S.
, Muller, A.
, Ling, A.
, Rutter, N.
, Flagg, E.
, Van, E.
, Migdall, A.
and Solomon, G.
(2011),
Coalescence of Single Photons Emitted by Disparate Single Photon Sources: The Example of InAs Quantum Dots and Parametric Down-Conversion Sources, Physical Review Letters, [online], https://doi.org/10.1103/PhysRevLett.107.157402
(Accessed October 14, 2025)
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Coalescence of Single Photons Emitted by Disparate Single Photon Sources: The Example of InAs Quantum Dots and Parametric Down-Conversion Sources
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, , , , , Edward Van Keuren, ,
Abstract
In quantum mechanics, particles in identical states are indistinguishable, giving rise to effects with no classical analog. 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. This technique can connect different elements in a quantum network.Citation
Physical Review Letters
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Created October 5, 2011, Updated November 10, 2018