Bosonic Indistinguishability-Dependent Contextuality

TL;DR

This paper reveals a novel form of quantum contextuality linked to boson indistinguishability, demonstrating non-classical behavior that cannot be simulated with classical light and enabling high-dimensional correlations through advanced measurement techniques.

Contribution

It introduces a new type of contextuality dependent on boson indistinguishability and higher-order interference, with a measurement scheme involving dispersive coupling to an ancillary qubit.

Findings

Identifies a form of contextuality tied to boson indistinguishability.

Shows this contextuality cannot be simulated classically.

Enables high-dimensional contextual correlations with delayed measurements.

Abstract

We uncover a form of quantum contextuality that connects maximal contextuality to boson indistinguihability in a similar way maximal nonlocality with respect to the Clauser-Horne-Shimony-Holt Bell inequality is connected to maximal entanglement. Unlike previous forms of photonic contextuality, this form cannot be simulated with classical light, as it relies on indistinguishability and higher-order interference. Ideal measurements on the bosonic system can be performed by means of dispersive coupling with an ancillary qubit. This allows us delaying at will the ending of each measurement and targeting high-dimensional contextual correlations, which are features which cannot be achieved with existing platforms.