Optimal randomness generation from optical Bell experiments

TL;DR

This paper calculates the maximum certifiable randomness in optical Bell experiments with entangled photons, providing new numerical insights and achieving four times more randomness than previous methods.

Contribution

It introduces a method to compute the maximal certifiable randomness in optical Bell tests under realistic conditions, surpassing previous results.

Findings

Achieved four times more randomness than previous methods.

Provided new numerical values for physical parameters.

Demonstrated the potential of optical Bell experiments for randomness certification.

Abstract

Genuine randomness can be certified from Bell tests without any detailed assumptions on the working of the devices with which the test is implemented. An important class of experiments for implementing such tests is optical setups based on polarisation measurements of entangled photons distributed from a spontaneous parametric down conversion source. Here we compute the maximal amount of randomness which can be certified in such setups under realistic conditions. We provide relevant yet unexpected numerical values for the physical parameters and achieve four times more randomness than previous methods.