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Generation of Pure-State Single-Photon Wavepackets by Conditional Preparation Based on Spontaneous Parametric Downconversion

Alfred B. U'Ren·Christine Silberhorn·Reinhard Erdmann·Konrad Banaszek·Warren P. Grice·Ian A. Walmsley·Michael G. Raymer
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Abstract

We study the conditional preparation of single photons based on parametric downconversion, where the detection of one photon from a given pair heralds the existence of a single photon in the conjugate mode. We derive conditions on the modal characteristics of the photon pairs, which ensure that the conditionally prepared single photons are quantum-mechanically pure. We propose specific experimental techniques that yield photon pairs ideally suited for single-photon conditional preparation.

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Alfred B. U'Ren, Christine Silberhorn, Reinhard Erdmann, Konrad Banaszek, Warren P. Grice, Ian A. Walmsley, Michael G. Raymer. 2006-11-02. Generation of Pure-State Single-Photon Wavepackets by Conditional Preparation Based on Spontaneous Parametric Downconversion. https://arxiv.org/abs/quant-ph/0611019

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