title: Coalescence of single photons emitted by disparate single-photon sources: the example of InAs quantum dots and parametric down-conversion sources.
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.
authors: Joint Quantum Institute, National Institute of Standards and Technology and University of Maryland, Gaithersburg, Maryland, USA.
authors: Sergey V
authors: SV
authors: Polyakov
authors: Andreas
authors: A
authors: Muller
authors: Edward B
authors: EB
authors: Flagg
authors: Alex
authors: A
authors: Ling
authors: Natalia
authors: N
authors: Borjemscaia
authors: Edward
authors: E
authors: Van Keuren
authors: Alan
authors: A
authors: Migdall
authors: Glenn S
authors: GS
authors: Solomon