Dynamical quantum Zeno effect

Details Dynamical quantum Zeno effect Dynamical quantum Zeno effect

Dec 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994phrva..50.4582p&link_type=abstract

Physical Review A (Atomic, Molecular, and Optical Physics), Volume 50, Issue 6, December 1994, pp.4582-4592

Physics

77

Scattering Theory, Fundamental Problems And General Formalism

Scientific paper

A purely dynamical explanation for the quantum Zeno effect is proposed. It is argued that a quantum system undergoes a quantum-Zeno-type dynamics as a consequence of a particular type of evolution involving a series of frequent spectral decompositions. The role of quantum measurements and of the ``collapse of the wave function'' is investigated and it is clarified that, provided a final observation is performed, the dynamical quantum Zeno effect can be obtained without making use of von Neumann's projection postulate. The meaning of infinitely frequent measurements is critically discussed and it is argued that it should be regarded as a mathematical idealization, impossible to realize from a physical point of view.

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