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arXiv quant-ph/01090532001-09-12quant-ph

Comment on "Evolution of a Quasi-Stationary State"

Duane A. Dicus, Wayne W. Repko, Roy F. Schwitters, Todd M. Tinsley

备注：: 8 pages, 6 figures, RevTex4
DOI：: 10.1103/PhysRevA.65.032116

英文摘要：

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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