Proposed experiments of qutrit state-independent contextuality and two-qutrit contextuality-based nonlocality

TL;DR

This paper proposes feasible experiments to observe qutrit state-independent contextuality with single photons and demonstrates how entangled qutrits can reveal nonlocality through Bell inequalities.

Contribution

It introduces an experimentally feasible test for qutrit state-independent contextuality and links noncontextual inequalities to Bell inequalities using entangled qutrits.

Findings

Feasible experimental setup for qutrit contextuality

Connection between noncontextual inequalities and Bell inequalities

Potential to observe quantum nonlocality with entangled qutrits

Abstract

Recent experiments have demonstrated ququart state-independent quantum contextuality and qutrit state-dependent quantum contextuality. So far, the most basic form of quantum contextuality pointed out by Kochen and Specker, and Bell, has eluded experimental confirmation. Here we present an experimentally feasible test to observe qutrit state-independent quantum contextuality using single photons in a three-path setup. In addition, we show that if the same measurements are performed on two entangled qutrits, rather than sequentially on the same qutrit, then the noncontextual inequality becomes a Bell inequality. We show that this connection also applies to other recently introduced noncontextual inequalities.