Programmable entanglement oscillations in a non Markovian channel

TL;DR

This paper demonstrates an all-optical setup to observe and control entanglement oscillations in polarization qubits within a non-Markovian environment, showcasing programmable entanglement revival and violation of Bell's inequality.

Contribution

It introduces a novel experimental method to engineer and observe entanglement dynamics in a non-Markovian channel using programmable optical components.

Findings

Achieved programmable entanglement oscillations.

Maximally revived state violates Bell's inequality by 17 standard deviations.

Demonstrated control over entanglement dynamics in a non-Markovian environment.

Abstract

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.