This work analyzes the temporal coherence and correlation of counterpropagating twin photons generated in a quasiphase matched nonlinear crystal by spontaneous parametric down-conversion.We find out different pictures depending on the pump pulse duration relative to two characteristic temporal scales, determined, respectively, by the temporal separation between the counterpropagating and the co-propagating wave packets. When the pump duration is intermediate between the two scales, we show a transition from a highly entangled state to an almost separable state, with strongly asymmetric spectral properties of the photons.

Temporal coherence and correlation of counterpropagating twin photons

BRAMBILLA, ENRICO
2015-01-01

Abstract

This work analyzes the temporal coherence and correlation of counterpropagating twin photons generated in a quasiphase matched nonlinear crystal by spontaneous parametric down-conversion.We find out different pictures depending on the pump pulse duration relative to two characteristic temporal scales, determined, respectively, by the temporal separation between the counterpropagating and the co-propagating wave packets. When the pump duration is intermediate between the two scales, we show a transition from a highly entangled state to an almost separable state, with strongly asymmetric spectral properties of the photons.
2015
http://harvest.aps.org/bagit/articles/10.1103/PhysRevA.92.053809/apsxml
Atomic and Molecular Physics, and Optics
Gatti, A.; Corti, T.; Brambilla, Enrico
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11383/2027281
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