Entanglement in neutrino oscillations

TL;DR

This paper explores how neutrino flavor oscillations involve quantum entanglement, linking it to measurable transition probabilities, and discusses potential experimental methods to utilize neutrino states for quantum information processing.

Contribution

It provides a detailed analysis of mode entanglement in neutrino oscillations and introduces an operational way to characterize single-particle entangled states in particle mixing.

Findings

Mode entanglement relates directly to flavor transition probabilities.

Single-neutrino entangled states can be used as quantum information resources.

The paper discusses experimental schemes for transferring quantum information from neutrinos.

Abstract

Flavor oscillations in elementary particle physics are related to multi-mode entanglement of single-particle states. We show that mode entanglement can be expressed in terms of flavor transition probabilities, and therefore that single-particle entangled states acquire a precise operational characterization in the context of particle mixing. We treat in detail the physically relevant cases of two- and three-flavor neutrino oscillations, including the effective measure of CP violation. We discuss experimental schemes for the transfer of the quantum information encoded in single-neutrino states to spatially delocalized two-flavor charged lepton states, thus showing, at least in principle, that single-particle entangled states of neutrino mixing are legitimate physical resources for quantum information tasks.