Entanglement in a system of two two-level atoms interacting with a single-mode field |
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| Authors: | Jin Li-Juan and Fang Mao-Fa |
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| Affiliation: | College of Physics and Information Science,Hunan Normal University, Changsha 410081, China |
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| Abstract: | We investigate the entanglement in a system of two coupling atoms
interacting with a single-mode field
by means of quantum information entropy theory.
The quantum entanglement between the two atoms and the coherent field is discussed by using
the quantum reduced entropy,
and the entanglement between the two coupling atoms is also investigated
by using the quantum relative entropy.
In addition, the influences of the atomic dipole--dipole interaction
intensity and
the average photon number of the coherent field on the degree of the entanglement is examined.
The results show that the evolution of the degree of entanglement between the two atoms
and the field is just opposite to that of the degree of entanglement between the two atoms.
And the properties of the quantum entanglement in the system rely on the
atomic dipole--dipole
interaction and the average photon number of the coherent field. |
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| Keywords: | quantum entanglement reduced entropy relative entropy |
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