Coherence measures for heralded single-photon sources

Details Coherence measures for heralded single-photon sources Coherence measures for heralded single-photon sources

2008-07-10

arxiv.org/abs/0807.1725v3

Phys. Rev. A 79, 035801 (2009)

Physics

Quantum Physics

4 pages, 4 figures, corrected Eq. (10)

Scientific paper

10.1103/PhysRevA.79.035801

Single-photon sources (SPSs) are mainly characterized by the minimum value of their second-order coherence function, viz. their $g^{(2)}$ function. A precise measurement of $g^{(2)}$ may, however, require high time-resolution devices, in whose absence, only time-averaged measurements are accessible. These time-averaged measures, standing alone, do not carry sufficient information for proper characterization of SPSs. Here, we develop a theory, corroborated by an experiment, that allows us to scrutinize the coherence properties of heralded SPSs that rely on continuous-wave parametric down-conversion. Our proposed measures and analysis enable proper standardization of such SPSs.

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