Decay process accelerated by tunneling in its very early stage

Abstract

We examine a fast decay process that arises in the transition period between the Gaussian and exponential decay processes in quantum decay systems. It is usually expected that the decay is decelerated by a confinement potential barrier. However, we find a case where the decay in the transition period is accelerated by tunneling through a confinement potential barrier. We show that the acceleration gives rise to an appreciable effect on the time evolution of the nonescape probability of the decay system.

4 pages, 6 figures; accepted for publication in Phys. Rev. A

References in corpus (2)

• Observation of the Quantum Zeno and Anti-Zeno effects in an unstable system
• Comment on "Evolution of a Quasi-Stationary State"

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• Formal Aspects of Quantum Decay
• Decay properties of unstable Tonks-Girardeau gases from a split trap
• Analysis of quantum decay law: Is quantum tunneling really exponential?