Cancelation of dispersion and temporal modulation with non-entangled frequency-correlated photons

TL;DR

This paper demonstrates that dispersion cancelation and temporal phase modulation effects, previously attributed to entanglement, can also occur with non-entangled frequency-correlated photons by introducing specific correlations.

Contribution

It shows that frequency correlations, not necessarily entanglement, are sufficient for observing dispersion cancelation and phase modulation effects.

Findings

Dispersion cancelation observed with non-entangled photons.

Temporal phase modulation effects can be replicated without entanglement.

Frequency correlations are key for these phenomena.

Abstract

The observation of the so-called dispersion cancelation (Opt. Express 17, 19244, 2009) and temporal phase modulation (Phys. Rev. Lett. 103, 163601, 2009) of paired photons is generally attributed to the presence of frequency entanglement between two frequency anticorrelated photons. In this paper, it is shown that by introducing the appropriate amount of chromatic dispersion or phase modulation between non-entangled photons, it is also possible to observe these effects. Indeed, it is found that the relevant characteristic for the observation of dispersion cancelation or the cancelation of temporal phase modulation is the presence of certain frequency correlations between the photons.