Purity deterioration of single photons though reconfigurable integrated delay lines

This experiment is intended to show that single photons can decohere providing their degrees of freedom are entangled with the environment.

The reason why this is interesting is because a single photon can provide as a benchmark for a full quantum system, more specifically can be treated as a qubit with interaction with the environment.

With this experiment we can study the effect of a reconfigurable photonics device on the purity of the qubit injected (the single photons encoded in path encoding).

I will show some preliminary result as well as some simulation to convey this idea and I will present a feasible experiment which can corroborate further my idea.