The role of initial state reconstruction in short and long time deviations from exponential decay

Details The role of initial state reconstruction in short and long time deviations from exponential decay The role of initial state reconstruction in short and long time deviations from exponential decay

2005-12-22

arxiv.org/abs/quant-ph/0512194v1

Phys. Rev. A, 73, 052112 (2006)

Physics

Quantum Physics

4 pages, 6 figures

Scientific paper

10.1103/PhysRevA.73.052112

We consider the role of the reconstruction of the initial state in the deviation from exponential decay at short and long times. The long time decay can be attributed to a wave that was, in a classical-like, probabilistic sense, fully outside the initial state or the inner region at intermediate times, i.e., to a completely reconstructed state, whereas the decay during the exponential regime is due instead to a non-reconstructed wave. At short times quantum interference between regenerated and non-regenerated paths is responsible for the deviation from the exponential decay. We may thus conclude that state reconstruction is a ``consistent history'' for long time deviations but not for short ones.

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