Criterion for Single Photon Sources

Abstract

We propose a criterion to classify and compare sources of single photons: the $p$-norm of their $k$th-order photon correlations. While ideally one should use the uniform norm with $p\to \infty$, in practice, the 3-norm already allows a meaningful comparison and shows the serious limitations of the usual criterion based on the second order correlation $g^{(2)}$ only. We apply this new criterion to a large family of popular single photon sources and show that some of them do not, in fact, qualify for this function. The best sources from our selections consist of a cascade of two-level systems, improving on the otherwise standard low-power resonant excitation of a single two-level system.

6 pages, 2 figures

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• Reconfigurable photon sources based on quantum plexcitonic systems
• Variational Renormalization Group for Dissipative Spin-Cavity Systems: Periodic Pulses of Nonclassical Photons from Mesoscopic Spin Ensembles
• Structure of the Harmonic Oscillator in the space of $n$-particle Glauber correlators
• Nonclassical Light Generation from III-V and Group-IV Solid-State Cavity Quantum Systems