Enhanced observability of quantum post-exponential decay using distant detectors

Details Enhanced observability of quantum post-exponential decay using distant detectors Enhanced observability of quantum post-exponential decay using distant detectors

2009-03-24

arxiv.org/abs/0903.4156v1

Physical Review A 80, 012703 (2009)

Physics

Quantum Physics

Scientific paper

We study the elusive transition from exponential to post-exponential (algebraic) decay of the probability density of a quantum particle emitted by an exponentially decaying source, in one dimension. The main finding is that the probability density at the transition time, and thus its observability, increases with the distance of the detector from the source, up to a critical distance beyond which exponential decay is no longer observed. Solvable models provide explicit expressions for the dependence of the transition on resonance and observational parameters, facilitating the choice of optimal conditions.

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