Quantum dwell times

Details Quantum dwell times Quantum dwell times

2004-03-10

arxiv.org/abs/quant-ph/0403081v1

Physics

Quantum Physics

4 pages, 2 eps figures

Scientific paper

We put forward several inherently quantum characteristics of the dwell time, and propose an operational method to detect them. The quantum dwell time is pointed out to be a conserved quantity, totally bypassing Pauli's theorem. Furthermore, the quantum dwell time in a region for one dimensional motion is doubly degenerate. In presence of a potential barrier, the dwell time becomes bounded, unlike the classical quantity. By using off-resonance coupling to a laser we propose an operational method to measure the absorption by a complex potential, and thereby the average time spent by an incoming atom in the laser region.

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