Time evolution of an unstable quantum system
Quantum Physics
2017-11-22 v1 High Energy Physics - Phenomenology
Abstract
After reviewing the description of an unstable state in the framework of Lee Hamiltonians (valid both for Quantum Mechanics (QM) and Quantum Field Theory (QFT)), we consider some theoretical aspects of non-exponential decays: the case of two decay channels, the broadening of the energy spectrum at short times, the effect of an imperfect measurement, the link to QFT, and the decay of an unstable moving particle with definite momentum. All the presented effects were not confirmed in experiments, hence are at the present stage predictions.
Cite
@article{arxiv.1708.02083,
title = {Time evolution of an unstable quantum system},
author = {Francesco Giacosa},
journal= {arXiv preprint arXiv:1708.02083},
year = {2017}
}
Comments
To appear in the proceedings of the second Jagiellonian Symposium of Fundamental and Applied Subatomic Physics, 4-9/6/2017, Krakow, Poland. 6 pages, 3 figures