State-independent quantum contextuality for continuous variables

TL;DR

This paper demonstrates that state-independent quantum contextuality extends to continuous-variable measurements, revealing the universal nature of quantum contextuality beyond dichotomic observables.

Contribution

It introduces a framework showing quantum contextuality in continuous spectra, broadening the scope of noncontextual inequality violations.

Findings

Quantum contextuality observed in continuous-variable systems

Universal character of quantum contextuality confirmed

Extends noncontextual inequalities to continuous spectra

Abstract

Recent experiments have shown that nature violates noncontextual inequalities regardless of the state of the physical system. So far, all these inequalities involve measurements of dichotomic observables. We show that state-independent quantum contextuality can also be observed in the correlations between measurements of observables with genuinely continuous spectra, highlighting the universal character of the effect.