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Generating strong anti-bunching by interfering nonclassical and classical states of light

Abstract : In quantum optics, the second-order correlation function g (2)(τ) characterizes the photon statistics of a state of light and can be used to distinguish between its classical or quantum nature. In this article, we study a simple setup which offers the possibility to generate quantum states of light with very small g (2)(0), a signature of strong anti-bunched light. This can be achieved by mixing on a beamsplitter a coherent state with a nonclassical state, such as a squeezed state, and even with a bunched state (g (2)(0) > 1) such as a Schrödinger cat state. We elucidate the interference mechanism generating such strong anti-bunching and relate it to the unconventional photon blockade. We also detail how this effect can be applied to detect weakly squeezed states of light.
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Rajiv Boddeda, Quentin Glorieux, Alberto Bramati, Simon Pigeon. Generating strong anti-bunching by interfering nonclassical and classical states of light. Journal of Physics B: Atomic, Molecular and Optical Physics, IOP Publishing, 2019, 52 (21), pp.215401. ⟨10.1088/1361-6455/ab3e98⟩. ⟨hal-02479143⟩

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