A quantum information theoretic analysis of three flavor neutrino oscillations

TL;DR

This paper applies quantum information theory to analyze three-flavor neutrino oscillations, revealing persistent entanglement, nonlocality, and nonclassicality in flavor-changing states, thus illuminating quantum aspects of weak interactions.

Contribution

It introduces a quantum information theoretic framework to study neutrino oscillations, demonstrating persistent entanglement and nonlocality in flavor states, which is a novel approach in this field.

Findings

Genuine multipartite entanglement persists in flavor states.

Bell-type nonlocal features are present in neutrino oscillations.

Nonclassicality measure 'dissension' remains nonzero over time.

Abstract

Correlations exhibited by neutrino oscillations are studied via quantum information theoretic quantities. We show that the strongest type of entanglement, genuine multipartite entanglement, is persistent in the flavour changing states. We prove the existence of Bell-type nonlocal features, in both its absolute and genuine avatars. Finally, we show that a measure of nonclassicality, dissension, which is a generalization of quantum discord to the tripartite case, is nonzero for almost the entire range of time in the evolution of an initial electron-neutrino. Via these quantum information theoretic quantities capturing different aspects of quantum correlations, we elucidate the differences between the flavour types, shedding light on the quantum-information theoretic aspects of the weak force.