Heralded generation of ultrafast single photons in pure quantum States.

Heralded generation of ultrafast single photons in pure quantum States.

We present an experimental demonstration of heralded single photons prepared in pure quantum states from a parametric down-conversion source. It is shown that, through controlling the modal structure of the photon pair emission, one can generate pairs in factorable states and thence eliminate the ne...

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Dades bibliogràfiques
Autors principals: Mosley, P, Lundeen, J, Smith, B, Wasylczyk, P, U'Ren, AB, Silberhorn, C, Walmsley, I
Format: Journal article
Idioma:English
Publicat: 2008
Descripció
Sumari:We present an experimental demonstration of heralded single photons prepared in pure quantum states from a parametric down-conversion source. It is shown that, through controlling the modal structure of the photon pair emission, one can generate pairs in factorable states and thence eliminate the need for spectral filters in multiple-source interference schemes. Indistinguishable heralded photons were generated in two independent spectrally engineered sources and Hong-Ou-Mandel interference observed between them without spectral filters. The measured visibility of 94.4% sets a minimum bound on the mean photon purity.

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