arXiv subjects

E. K. Bashkirov

Publications and source records attributed to E. K. Bashkirov.

7 recordsLinked to original sources

arXiv2014

Atom-field entanglement in two-atom Jaynes-Cummings model with intensity-dependent coupling

An exact solution of the problem of two-atom one- and two-mode Jaynes-Cummings model with intensity-dependent coupling is presented. Asymptotic solutions for system state vectors are obtained in the approximation of large initial coherent fields. The atom-field entanglement is investigated on the basis of the reduced atomic entropy dynamics. The possibility of the system being initially in a pure disentangled state to revive into this state during the evolution process for both models is shown. Conditions and times of disentanglement are derived.

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arXiv2012

The dynamics of entanglement in two-atom Tavis-Cummings model with non-degenerate two-photon transitions for tripartite entangled W-like states

The influence of dipole-dipole interaction on the entanglement between two atoms with different initial entangled W-like states in Tavis-Cummings model with degenerate two-photon transitions has been investigated. The results show that the entanglement between two atoms can be increased by means of dipole-dipole interaction and for some initial states the entanglement sudden death effect can be weakened.

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arXiv2012

The influence of dipole-dipole interaction on entanglement in nondegenerate two-photon Tavis-Cummings model with atomic coherence

The entanglement of two dipole-coupled atoms with nondegenerate two-photon transitions interacting with two-mode field in lossless cavity has been investigated. It shows that the entanglement is dependent on the initial atomic states. The possibility of considerable growth of atomic entanglement due atomic coherence and dipole-dipole interaction is shown in the case of great mean values of thermal photons.

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arXiv2005

Entanglement induced by a two-mode thermal field

The entanglement between two identical two-level atoms interacting with two mode thermal field through a nondegenerate two-photon process has been suggested. It has been shown that for some atomic initial state the entanglement induced by nondegenerate two-photon interaction is larger than that induced by one-photon and degenerate two-photon processes.

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arXiv2005

On evolution of the purity of two nonidentical two-level atoms interecting with one-mode coherent field

The resonant interaction of two nonidentical two-level atoms with one mode of the electromagnetic field has been considered. The pure-state evolution of the atomic states for field initially in the coherent state and atoms in the ground state has been investigated. It has been shown that for intermediate values of the relative differences of two coupling constants the atoms as well as the field are returned most closely to a pure state at the revival time. The possibility of the maximally entangled states at the beginning of the collapse time has been discussed.

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arXiv2005

Squeezing and amplitude-squared squeezing effects on the dynamics of two nonidentical two-level Squeezing and amplitude-squared squeezing effects on the dynamics of two nonidentical two-level atoms atoms

Squeezing and amplitude-squared squeezing for two two-level nonidentical atoms in lossless cavity has been investigated assuming the field to be initially in the coherent state. The time-dependent squeezing parameters has been calculated. The influence of the relative differences of two coupling constants on the squeezing parameters has been analyzed.

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arXiv2005

Dissipative dynamics of nondegenerate two-photon Jaynes-Cummings model

A nondegenerate two-photon Jaynes-Cummings model is investigated where the leakage of photon through the cavity is taken into account. The effect of cavity damping on the mean photon number, atomic populations, field statistics and both field and atomic squeezing is considered on the basis of master equation in dressed-state approximation for initial coherent fields and excited atom.

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