TY - JOUR
T1 - Time-dependent quantum weak values
T2 - Decay law for postselected states
AU - Davies, Paul
N1 - Copyright:
Copyright 2009 Elsevier B.V., All rights reserved.
PY - 2009/3/3
Y1 - 2009/3/3
N2 - 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.
AB - 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.
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U2 - 10.1103/PhysRevA.79.032103
DO - 10.1103/PhysRevA.79.032103
M3 - Article
AN - SCOPUS:63049084339
SN - 1050-2947
VL - 79
JO - Physical Review A - Atomic, Molecular, and Optical Physics
JF - Physical Review A - Atomic, Molecular, and Optical Physics
IS - 3
M1 - 032103
ER -