Neutrino Decoherence in Simple Open Quantum Systems
- URL: http://arxiv.org/abs/2009.13471v2
- Date: Thu, 15 Apr 2021 21:50:33 GMT
- Title: Neutrino Decoherence in Simple Open Quantum Systems
- Authors: Bin Xu
- Abstract summary: Neutrinos lose coherence as they propagate, which leads to the fading away of oscillations.
We model neutrino decoherence induced in open quantum systems from their interaction with the environment.
- Score: 4.375669765443605
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: Neutrinos lose coherence as they propagate, which leads to the fading away of
oscillations. In this work, we model neutrino decoherence induced in open
quantum systems from their interaction with the environment. We first present
two different models in the quantum mechanical framework, in which the
environment is modeled as forced harmonic oscillators with white noise
interactions, or two-level systems with stochastic phase kicks. We then look at
the decoherence process in the quantum field theoretic framework induced by
elastic scatterings with environmental particles. The exponential decay is
obtained as a common feature for all models, which shows the universality of
the decoherence processes. We discuss connections to the GKSL master equation
approach and give a clear physical meaning of the Lindblad operators. We
demonstrate that the universality of exponential decay of coherence is based on
the Born-Markov approximation. The models in this work are suitable to be
extended to describe real physical processes that could be non-Markovian.
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