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Chinese journal of atomic and molecular physics

The time-evolution of atomic particle's occupancy in the system of single-mode field interacting with N-type four-level atom

Huang Chun-Jia

Published Jan 1, 2002• 0 citations
OpenAlex

Abstract

The wave-function of the system of single-mode field interacting with N-type four-level atom is solved exactly, and the time-evolution of atomic particle's occupancy is analyzed by means of numerical method. The N-type four-level atom is about equal to the two-level atom whose every level has double-skin fine structure, it could degenerate into V-type or Λ-type three-level atom even into simple two-level atom under some conditions. The results of the studies indicate that the time-evolution of atomic particle's occupancy of the four-level system is nonperiodic.

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The wave-function of the system of single-mode field interacting with N-type four-level atom is solved exactly, and the time-evolution of atomic particle's occupancy is analyzed by means of numerical method. The N-type four-level atom is about equal to the two-level atom whose every level has double-skin fine structure, it could degenerate into V-type or Λ-type three-level atom even into simple two-level atom under some conditions. The results of the studies indicate that the time-evolution of atomic particle's occupancy of the four-level system is nonperiodic.
Using Tavis-Cummings model,the evolution of the atom's occupancy in interaction of two coupling two-level atoms with the single mode coherent field through multiphoton transition is studied.The influences of coupling coefficient between atoms,the initial mean photon number of field and the degree of entanglement of two atoms on the evolution of the atom's occupancy are discussed.The results obtained by numerical calculations show that the initial mean photon number of field influences violently the evolution properties of the atom's occupancy,the influence of coupling coefficient between atoms may be neglected,and the degree of entanglement of two atoms influences the reverse of atoms.