Interaction-free measurement of multiple objects using a universal integrated photonic processor

TL;DR

This paper demonstrates the experimental implementation of interaction-free measurement (IFM) for multiple objects using a single photon on a cloud-based integrated photonic processor, extending previous single-object schemes.

Contribution

It introduces a scalable method for simultaneous IFM of multiple objects with a single quantum probe on an integrated photonic platform.

Findings

Successfully performed sequential IFM of up to 5 objects.

Experimental results align with theoretical predictions.

Showcases a practical approach to complex quantum interrogation tasks.

Abstract

The phenomenon of interaction-free measurement (IFM) enables the probabilistic detection of an absorbing object with reduced photon absorption. We report the experimental implementation of a simultaneous IFM of multiple objects using a single quantum probe on the cloud-based Ascella photonic processor of company Quandela. We demonstrate sequential IFM of up to 5 objects using a single photon, significantly extending the original IFM scheme for a single object. The experimental error-mitigated results confirm the theoretical predictions for this sequential IFM setup, and demonstrate a practical approach to scaling IFM to more complex quantum interrogation tasks.