Pseudo information entropy of a single trapped ion interacting with a laser field

  • Authors:

  • A.-S. F. Obada;S. Furuichi;H. F. Abdel-Hameed;M. Abdel-Aty

  • Affiliations:

  • Department of Mathematics, Faculty of Science, Al-Azhar University, Nasr City, Cairo 11884, Egypt;Tokyo University of Science, Yamaguchi, Onoda City, Yamaguchi 756-0884, Japan;Department of Mathematics, Faculty of Science, South Valley University, Sohag, Egypt;Department of Mathematics, Faculty of Science, South Valley University, Sohag, Egypt

  • Venue:
  • Information Sciences: an International Journal - Special issue: Optics and information sciences
  • Year:
  • 2004

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Abstract

In this communication, we use the pseudo entropy as a measure of information content of ionic state due to ion-laser interaction in a single trapped ion. We examine numerically the population inversion, and the entropy for the system. Minima for the degree of entanglement occur during the transition from maxima to minima (and vice-versa) for the atomic inversion. Successive peaks show a lowering of the local maximum point indicating a dissipative irreversible change in the ionic state. The results show that, the decoherence effect yields loss of information. The general conclusions reached are illustrated by numerical results.