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    Neutrino quantum decoherence in a fluctuating ALPs field

    Alexey Lichkunov*

    Konstantin Stankevich†

    Alexander Studenikin‡

    • Department of Theoretical Physics and Department of Physics of Particles and Extreme States of Matter, Faculty of Physics, Lomonosov Moscow State University, 119992 Moscow, Russia

    • *Contact author: lichkunov.aa15@physics.msu.ru
    • †Contact author: kl.stankevich@physics.msu.ru
    • ‡Contact author: studenik@srd.sinp.msu.ru
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    Phys. Rev. D 112, 123007 – Published 4 December, 2025

    DOI: https://doi.org/10.1103/16ml-srzs

    Abstract

    The evolution of neutrinos in a fluctuating classical axionlike particles (ALPs) field is investigated. The equation for the neutrino density matrix is obtained in the Redfield form, and the corresponding dissipative matrix is derived. Estimates on the ALP-neutrino coupling constants are obtained using the limits on the decoherence parameter determined from the analysis of reactor neutrino experiments data.

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    Phys. Rev. D 112, 123007– Published 4 December, 2025
    • Received 22 September 2025
    • Accepted 14 November 2025
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