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GR: Fachverband Gravitation und Relativitätstheorie
GR 1: CQG I
GR 1.2: Vortrag
Montag, 31. März 2025, 17:30–17:50, ZHG008
Understanding gravitationally induced decoherence parameters in neutrino oscillations using a microscopic quantum mechanical model — Alba Domi1, Thomas Eberl1, Max Joseph Fahn2, Kristina Giesel1, Lukas Hennig1, Ulrich Katz1, •Roman Kemper1, and Michael Kobler1 — 1Friedrich-Alexander Universität Erlangen-Nürnberg, Germany — 2Università di Bologna, Italy
In this talk, the role of gravitationally induced decoherence in open quantum systems is explored in the context of neutrinos. A microscopic quantum mechanical model introduced by Blencowe and Xu is applied to neutrino oscillations, motivated by the coupling between neutrinos and the gravitational wave environment suggested by linearised gravity. The analysis demonstrates that, for neutrino oscillations in vacuum, gravitationally induced decoherence matches phenomenological models, with decoherence parameters exhibiting an inverse quadratic energy dependence. When matter effects are included, the decoherence parameters depend on the varying matter density across the Earth's layers. Moreover, the form of the decoherence parameters is explicitly derived from the microscopic model, providing a physical interpretation. This talk is based on the work in "Understanding gravitationally induced decoherence parameters in neutrino oscillations using a microscopic quantum mechanical model", published in JCAP, 2024, 11, 006.
Keywords: Quantum Gravity; Decoherence Models; Neutrino Oscillations; Open Quantum Systems