A novel technique to achieve atomic macro-coherence as a tool to determine the nature of neutrinos

TL;DR

This paper proposes a robust adiabatic technique, double CPR, to induce near-perfect atomic macro-coherence, enhancing the potential of RENP processes to probe neutrino properties.

Contribution

It introduces a modified double CPR method for achieving high atomic coherence, improving the feasibility of neutrino mass spectrum investigations via RENP.

Findings

Double CPR achieves near 100% atomic coherence.

The method is highly robust against experimental variations.

Enhanced coherence improves sensitivity of neutrino detection.

Abstract

The photon spectrum in macrocoherent atomic de-excitation via radiative emission of neutrino pairs (RENP) has been proposed as a sensitive probe of the neutrino mass spectrum, capable of competing with conventional neutrino experiments. In this paper we revisit this intriguing possibility, presenting an alternative method for inducing large coherence in a target based on adiabatic techniques. More concretely, we propose the use of a modified version of Coherent Population Return (CPR), namely double CPR, that turns out to be extremely robust with respect to the experimental parameters, and capable of inducing a coherence close to 100% in the target.