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Autor Porras, Miguel A. |
Documentos disponibles escritos por este autor (7)
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Porras, Miguel A. ; Luis Aina, Alfredo ; Gonzalo Fonrodona, Isabel | American Physical Society | 2013-11-04We provide theoretical and experimental evidence of a classical-optics realization of quantum Zeno dynamics. In contrast to other approaches, the classical implementation is extremely simple and adaptable. Frequently monitoring the transverse sp[...]texto impreso
Porras, Miguel A. ; Gonzalo Fonrodona, Isabel ; Luis Aina, Alfredo | American Physical Society | 2016-04-07We show that quantum Zeno dynamics can be mimicked by the isolated evolution of an unobserved system in an effective potential. Monitoring frequently whether a particle remains in a region of space leads to the same wave-packet dynamics as placi[...]texto impreso
Porras, Miguel A. ; Gonzalo Fonrodona, Isabel ; Mondello, Alessia | American Physical Society | 2003-06-17We study the group velocity of pulsed light beams in vacuum. Gouy's phase associated with the diffraction of transversally limited pulses can create a strong anomalous dispersion in vacuum leading to highly superluminal and negative group veloci[...]texto impreso
Porras, Miguel A. ; Luis Aina, Alfredo ; Gonzalo Fonrodona, Isabel | American Physical Society | 2014Although the quantum Zeno effect takes its name from Zeno’s arrow paradox, the effect of frequently observing the position of a freely moving particle on its motion has not been analyzed in detail in the frame of standard quantum mechanics. We s[...]texto impreso
Porras, Miguel A. ; Luis Aina, Alfredo ; Gonzalo Fonrodona, Isabel ; Sanz, Ángel S. | American Physical Society | 2011-11-14We 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 wav[...]texto impreso
Luis Aina, Alfredo ; Gonzalo Fonrodona, Isabel ; Porras, Miguel A. | American Physical Society | 2013-06-20We describe a version of the Zeno effect where the monitored physical property cannot be represented by a standard operator in the system space and the evolution to be prevented by observation is not unitary. This is the case of quantum-state pu[...]texto impreso
We describe an experiment in which the rotation of the polarization of light propagating in an optically active water solution of D-fructose tends to be inhibited by frequent monitoring whether the polarization remains unchanged. This is an exam[...]