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Experimental observation of double-peak structure of coincidence spectra in ultra-fast Spontaneous Parametric Down Conversion

The requirement on the symmetry of the biphoton wave function results in a double peak structure of the coincidence spectra of Spontaneous Parametric Down Conversion (SPDC) [1]. In this work we report the experimental observation of this effect by careful tailoring parameters of the SPDC crystal, the ultra-fast pump laser, and the measurement setup. The results are shown to be relevant to quantum state engineering of ultra-fast polarization-, or frequency-entangled mixed states.

preprint2012arXivOpen access
Dmitry A. KalashnikovMikhail V. FedorovLeonid A. Krivitsky
physics.opticsquant-ph
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Dmitry A. KalashnikovMikhail V. FedorovLeonid A. Krivitsky

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