Temporal coherence and correlation of counterpropagating twin photons
Quantum Physics
2017-11-23 v1 Optics
Abstract
This work analyses the temporal coherence and correlation of counterpropagating twin photons generated in a quasi-phase matched nonlinear cristal 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 counter-propagating and the co-propagating wavepackets. 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.
Keywords
Cite
@article{arxiv.1506.08635,
title = {Temporal coherence and correlation of counterpropagating twin photons},
author = {Alessandra Gatti and Tommaso Corti and Enrico Brambilla},
journal= {arXiv preprint arXiv:1506.08635},
year = {2017}
}
Comments
Submitted to Phys. Rev. A