Zeno dynamics in wave-packet diffraction spreading

Porras, Miguel A.; Luis Aina, Alfredo; Gonzalo Fonrodona, Isabel; Sanz, Ángel S.

Zeno dynamics in wave-packet diffraction spreading

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Official URL

http://dx.doi.org/10.1103/PhysRevA.84.052109

Publication date

2011

Authors

Porras, Miguel A.

Luis Aina, Alfredo

Gonzalo Fonrodona, Isabel

Sanz, Ángel S.

Publisher

American Physical Society

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URI

https://hdl.handle.net/20.500.14352/44591

Citation

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Abstract

We analyze a simple and feasible practical scheme displaying Zeno, anti-Zeno, and inverse-Zeno effects in the observation of wave-packet spreading caused by free evolution. The scheme is valid both in spatial diffraction of classical optical waves and in time diffraction of a quantum wave packet. In the optical realization, diffraction spreading is observed by placing slits between a light source and a light-power detector. We show that the occurrence of Zeno or anti-Zeno effects depends just on the frequency of observations between the source and detector. These effects are seen to be related to the diffraction mode theory in Fabry-Perot resonators.

Description

©2011 American Physical Society. Support from the Ministerio de Ciencia e Innovacion (Spain) under Projects No. FIS2010-22082 (M.A.P., I.G., A.S.S.), No. FIS2008-01267 (A.L.), and No. FIS2010-18132 (A.S.S.) is acknowledged. A.L. also acknowledges support from Project QUITEMAD S2009-ESP-1594, from the Consejeria de Educacion de la Comunidad de Madrid. A.S.S. would also like to thank the Ministerio de Ciencia e Innovacion (Spain) for a "Ramon y Cajal" Grant.