Revisiting quantum decoherence for neutrino oscillations in matter with constant density

Abstract

We reexamine the matter neutrino oscillation probabilities considering the decoherence phenomenon as a subleading effect. In this paper we point out the relevance of having the correct interpretation of the decoherence matrix in the different quantum bases, within the framework of neutrino oscillation probabilities in matter. Based on this treatment we develop an analytical formula for matter neutrino oscillation probabilities for three generations, with a range of application up to the decoherence parameter Γ ∼ 10 −23 GeV. We observe that, due to decoherence, the amplitudes of the neutrino/antineutrino oscillation probabilities increase in an energy independent way. We also find that decoherence can reduce the absolute value of the CP asymmetry, relative to its value at the pure oscillation case. As a side effect we have found a degeneracy between the decoherence parameter Γ and the CP violation phase δ.

Neutrino oscillations in a quantum processor

“…Decoherence is a non-standard neutrino oscillation effect 20,45,46 that is often considered in connection with quantum gravity or spacetime foam models 47 . In decoherence scenarios, development of entanglements between parts of the neutrino wave function and an external environment lead to partial collapse of the wave function and suppression of oscillations.…”

Testing quantum decoherence at DUNE

“…As mentioned in Ref. [67], the relationship between VMB and MMB decoherence matrices goes as follows:…”

Quantum contextuality of a single neutrino under interactions with matter

“…In our theoretical work, we want to study a complementary topic and examine how the system of 3 oscillating neutrinos exhibit the contextuality in the presence of matter. Furthermore, we want to investigate how the effect of this interaction becomes influenced by decoherence [34]. We show, although it may seem counter-intuitive, that the interaction with a normal matter modifying neutrino oscillations results in effective revivals of the quantum contextuality.…”

“…Moreover, as the decoherence effects has been proposed as a possible explanation of certain experimental data [47][48][49][50], also the constraints on decoherence parameters are related to experimental data [51,52]-see [34] for a summary of a recent progress on that topic. Since in our case the dimension N=3, the matrices F n are generators of SU ( Let us emphasize that equation (18) is written in the flavour basis.…”