Time ordering effects in the generation of entangled photons using nonlinear optical processes
arXiv:1410.0012 · doi:10.1103/PhysRevLett.114.093903
Abstract
We study the effects of time ordering in photon generation processes such as spontaneous parametric down-conversion (SPDC) and four wave mixing (SFWM). The results presented here are used to construct an intuitive picture that allows us to predict when time ordering effects significantly modify the joint spectral amplitude (JSA) of the photons generated in SPDC and SFWM. These effects become important only when the photons being generated lie with the pump beam that travels through the non-linear material for a significant amount of time. Thus sources of spectrally separable photons are ideal candidates for the observation of modifications of the JSA due to time ordering.
arXiv comment6+4 pages. Comments are welcome
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