Entanglement of an Effective Two-Level Atom Interacting with Two Quantized Field Modes

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概要

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• Starting from a three-level atom coupled to two modes of a radiation field, we derive a Raman-coupled Hamiltonian. The exact results are employed to carry out a careful investigation of the temporal evolution of the entropy. A factorization of the initial density operator is assumed, with the privileged field modes being in a coherent state. We invoke the mathematical concept of the maximum variation of a function to construct a measure for entropy fluctuations. It is shown that when the individual modes of the field are far detuned from the intermediate atomic level, there is a dynamical Stark shift induced by the Kerr-like medium. The results show that the Kerr effect creates the superstructure of atomic Rabi oscillation and changes the quasiperiod of the field entropy evolution and entanglement between the atom and the field. The dynamic behavior of the mean atomic level occupation probabilities are investigated numerically as functions of time. A number of novel phenomena are discovered and discussed.

• 理論物理学刊行会の論文
• 2002-01-25

著者

• Furuichi S

  Science University Of Tokyo In Yamaguchi

• Furuichi Shigeru

  Science University Of Tokyo In Yamaguchi

• Mahmoud ABDEL-ATY

  Mathematics Department, Faculty of Science, South Valley University

• Abdel-aty Mahmoud

  Mathematics Department Faculty Of Science

• Mahmoud Abdel-aty

  Mathematics Department Faculty Of Science South Valley University

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