Factorization properties of coherent fields

Alexander N. Kvinikhidze, B. L. Markovskii, D. Ts. Stoyanov +1 more

Caihua Zhang, Sachuerfu, Gerile

The quantum entanglement of two entangled atoms interacting with the squeezed coherent state is studied by means of full quantum theory. The influences of coherent amplitude factor, squeezing factor, ratio of two coupling coefficients on the entanglement property are discussed. The results show that two atoms entanglement evolution property is opposed to atom-field entanglement evolution property when the coherent amplitude factor was zero or small. The interaction of the atoms and field weakens the entanglement degree of atom-atom. With increasing coherent amplitude factor or decreasing squeezing factor of light, the time of two atoms staying in the steady entangled state becomes longer. The increase of the coherent amplitude factor or the decrease of squeezing factor of light lead to the increase of atom-atom entanglement degree while the decrease of atoms-field entanglement degree. Moreover, the two-atom quantum state stays in the maximum entangled state when the atomic dipole-dipole coupling coefficient is large enough.

Liu Su-mei

In this paper, the photon statistical properties vs. time in the system of Λ-type atom interacting with squeezed coherent light field inside a high Q with a Kerr medium is investigated by means of the interacting picture.Meanwhile, the influence of Kerr medium μ, the squeezed light field factors γ the coherent vibration amplitude |α| 2 and the coupling parameters λ of the field-atom on the photon statistical properties are also discussed. It has been shown that the intensity coefficient μ of Kerr medium, the squeezed light field factor γ,the coherent vibration amplitude |α| 2 of the light field and the coupling parameter λ of the field-atom influence the quantum collapse-revival periodicity of the evolution curves of Mandel factor Q(t).Meanwhile, they all influence the states and properties of the photon statistical distribution of radiation field.

Prakash Chand

Liu Su-mei

The evolution properties of Mandel Q(t) with time in the system of V-type atom interacting with squeezed coherent light field inside a high Q with a Kerr medium was investigated. It was shown that the intensity coefficient μ of Kerr medium, the squeezed light field factor γ, the coherent vibration amplitude |α|2 of the light field and the coupling parameter A of the field-atom influence the quantum collapse-revival periodicity of the evolution curves of Mandel factor Q(t). Meanwhile, they all influence the states and properties of the photon statistical distribution of radiation field.

J. Perˇina