Comment on "Evolution of a Quasi-Stationary State"

Details Comment on "Evolution of a Quasi-Stationary State" Comment on "Evolution of a Quasi-Stationary State"

2001-09-12

arxiv.org/abs/quant-ph/0109053v1

Physics

Quantum Physics

8 pages, 6 figures, RevTex4

Scientific paper

Approximately forty years ago it was realized that the time development of decaying systems might not be precisely exponential. Rolf Winter (Phys. Rev. {\bf 123}, 1503 (1961)) analyzed the simplest nontrivial system - a particle tunneling out of a well formed by a wall and a delta-function. He calculated the probability current just outside the well and found irregular oscillations on a short time scale followed by an exponential decrease followed by more oscillations and finally by a decrease as a power of the time. We have reanalyzed this system, concentrating on the survival probability of the particle in the well rather than the probability current, and find a different short time behavior.

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