中国物理B ›› 2010, Vol. 19 ›› Issue (7): 74207-074207.doi: 10.1088/1674-1056/19/7/074207

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Single-atom entropy squeezing and quantum entanglement in Tavis--Cummings model with atomic motion

邹艳   

  1. Department of Physics, Dezhou University, Dezhou 253023, China Key Biophysics Laboratory in Universities of Shandong, Dezhou 253023, China
  • 出版日期:2010-07-15 发布日期:2010-07-15
  • 基金资助:
    Project supported by the Science and Technology Program of Dezhou, Shandong Province, China (Grant No. 20080153) and the Scientific Research Fund of Dezhou University, China (Grant No. 07024).

Single-atom entropy squeezing and quantum entanglement in Tavis--Cummings model with atomic motion

Zou Yan (邹艳)   

  1. Department of Physics, Dezhou University, Dezhou 253023, China Key Biophysics Laboratory in Universities of Shandong, Dezhou 253023, China
  • Online:2010-07-15 Published:2010-07-15
  • Supported by:
    Project supported by the Science and Technology Program of Dezhou, Shandong Province, China (Grant No. 20080153) and the Scientific Research Fund of Dezhou University, China (Grant No. 07024).

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摘要： We examine the single-atom entropy squeezing and the atom—field entanglement in a system of two moving two-level atoms interacting with a single-mode coherent field in a lossless resonant cavity. Our numerical calculations indicate that the squeezing period, the squeezing time and the maximal squeezing can be controlled by appropriately choosing the atomic motion and the field-mode structure. The atomic motion leads to a periodical time evolution of entanglement between the two-atom and the field. Moreover, there exists corresponding relation between the time evolution properties of the atomic entropy squeezing and that of the entanglement between the two atoms and the field.

Abstract: We examine the single-atom entropy squeezing and the atom—field entanglement in a system of two moving two-level atoms interacting with a single-mode coherent field in a lossless resonant cavity. Our numerical calculations indicate that the squeezing period, the squeezing time and the maximal squeezing can be controlled by appropriately choosing the atomic motion and the field-mode structure. The atomic motion leads to a periodical time evolution of entanglement between the two-atom and the field. Moreover, there exists corresponding relation between the time evolution properties of the atomic entropy squeezing and that of the entanglement between the two atoms and the field.

Key words: atomic entropy squeezing, quantum reduced entropy, Tavis--Cummings model, atomic motion and field-mode structure

中图分类号:  (Quantum state engineering and measurements)

  • 42.50.Dv
03.65.Ud (Entanglement and quantum nonlocality) 03.67.Mn (Entanglement measures, witnesses, and other characterizations) 37.10.Vz (Mechanical effects of light on atoms, molecules, and ions)