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Physics Letters A

A theoretical approach to the decay of unstable states providing a correct description both of short and long time behaviour

Teresa Fonseca, Paolo Grigolini A, Paolo Marin

Published Mar 1, 1982• 20 citations
Publisher
DOI
10.1016/0375-9601(82)90277-8

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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.