Time-dependent quantum weak values: Decay law for postselected states

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Abstract

Weak measurements offer insights into the behavior of quantum systems. Combined with postselection, quantum mechanics predicts a range of experimentally testable phenomena. In this paper I consider weak measurements performed on time-dependent preselected and postselected ensembles, with emphasis on the decay of excited states. The results show that the standard exponential decay law is a limiting case of a more general law that depends on both the time of postselection and the choice of final state. The generalized law is illustrated for two interesting choices of postselection.

Original languageEnglish (US)
Article number032103
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Volume79
Issue number3
DOIs
Publication statusPublished - Mar 3 2009

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ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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