Minimal Irreversible Quantum Mechanics

Details Minimal Irreversible Quantum Mechanics Minimal Irreversible Quantum Mechanics

1996-12-17

arxiv.org/abs/quant-ph/9612041v1

Physics

Quantum Physics

30 pages, latex, no figures, email of first author castagni@iafe.uba.ar

Scientific paper

It is demonstrated that, making minimal changes in ordinary quantum mechanics, a reasonable irreversible quantum mechanics can be obtained. This theory has a more general spectral decompositions, with eigenvectors corresponding to unstable states that vanish when $t \to \infty .$ These ''Gamov vectors'' have zero norm, in such a way that the norm and the energy of the physical states remain constant. The evolution operator has no inverse, showing that we are really dealing with a time-asymmetric theory. Using Friedrichs model reasonable physical results are obtained, e. g. : the remaining of an unstable decaying state reappears, in the continuous spectrum of the model, with its primitive energy.

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