We suggest and demonstrate an all-optical experimental setup to observe and engineer entanglement oscillations of a pair of polarization qubits in a non-Markovian channel. We generate entangled photon pairs by spontaneous parametric downconversion (SPDC), and then insert a programmable spatial light modulator in order to impose a polarization dependent phase-shift on the spatial domain of the SPDC output and to create an effective non-Markovian environment. Modulation of the enviroment spectrum is obtained by inserting a spatial grating on the signal arm. In our experiment, programmable oscillations of entanglement are achieved, with the maximally revived state that violates Bell's inequality by 17 standard deviations.
@article{arxiv.1009.3228,
title = {Programmable entanglement oscillations in a non Markovian channel},
author = {Simone Cialdi and Davide Brivio and Enrico Tesio and Matteo G. A. Paris},
journal= {arXiv preprint arXiv:1009.3228},
year = {2015}
}