1105.3956 (R. Prevedel et al.)

Classical analog for dispersion cancellation of entangled photons with
local detection    [PDF]

R. Prevedel, K. M. Schreiter, J. Lavoie, K. J. Resch

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.

View original: http://arxiv.org/abs/1105.3956