Classical analog for dispersion cancellation of entangled photons with local detection

Details Classical analog for dispersion cancellation of entangled photons with local detection Classical analog for dispersion cancellation of entangled photons with local detection

2011-05-19

arxiv.org/abs/1105.3956v2

Phys. Rev. A 84, 051803(R) (2011)

Physics

Quantum Physics

4 pages, 3 figures, matches published version

Scientific paper

10.1103/PhysRevA.84.051803

Energy-time entangled photon pairs remain tightly correlated in time when the photons are passed through equal magnitude, but opposite in sign, dispersion. A recent experimental demonstration has observed this effect on ultrafast time-scales using second-harmonic generation of the photon pairs. However, the experimental signature of this effect does not require energy-time entanglement. Here, we demonstrate a directly analogue to this effect in narrow-band second harmonic generation of a pair of classical laser pulses under similar conditions. Perfect cancellation is observed for fs pulses with dispersion as large as 850 fs$^2$, comparable to the quantum result, but with an $10^{13}$-fold improvement in signal brightness.

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