中国物理B ›› 2008, Vol. 17 ›› Issue (4): 1248-1253.doi: 10.1088/1674-1056/17/4/017

• CLASSICAL AREAS OF PHENOMENOLOGY • 上一篇    下一篇

Fidelity of quantum information for V-type three-level atom interacting with a number state light field in Kerr medium

刘素梅, 贺安之, 纪运景   

  1. School of Science, Nanjing University of Science and Technology, Nanjing 210094, China
  • 收稿日期:2007-03-14 修回日期:2007-07-16 出版日期:2008-04-01 发布日期:2008-04-01

Fidelity of quantum information for V-type three-level atom interacting with a number state light field in Kerr medium

Liu Su-Mei(刘素梅)†, He An-Zhi(贺安之), and Ji Yun-Jing(纪运景)   

  1. School of Science, Nanjing University of Science and Technology, Nanjing 210094, China
  • Received:2007-03-14 Revised:2007-07-16 Online:2008-04-01 Published:2008-04-01

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摘要： In this paper the evolution characteristics of the fidelity of quantum information for the V-type three-level atom interacting with number state light field in Kerr medium are investigated. It shows that the periodicity of the evolutions of fidelity of quantum information is influenced by the Kerr coefficient, the photon number of the initial field and intensity of light. The evolutions of the fidelity of quantum information are modulated by the initial number state field. The Rabi oscillation frequency and the modulation frequency of fidelity for the field and the system vary with the value of the Kerr coefficient. The evolutions of fidelity of quantum information obviously show the quantum collapse and revival behaviours in the system of atom interacting with light field.

Abstract: In this paper the evolution characteristics of the fidelity of quantum information for the V-type three-level atom interacting with number state light field in Kerr medium are investigated. It shows that the periodicity of the evolutions of fidelity of quantum information is influenced by the Kerr coefficient, the photon number of the initial field and intensity of light. The evolutions of the fidelity of quantum information are modulated by the initial number state field. The Rabi oscillation frequency and the modulation frequency of fidelity for the field and the system vary with the value of the Kerr coefficient. The evolutions of fidelity of quantum information obviously show the quantum collapse and revival behaviours in the system of atom interacting with light field.

Key words: quantum optics, fidelity, number state, Kerr medium

中图分类号:  (Quantum information)

  • 03.67.-a
37.10.Vz (Mechanical effects of light on atoms, molecules, and ions)