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The entanglement of a two two-level atoms interacting with a cavity field in the presence of intensity-dependent coupling regime, atom–atom, dipole–dipole interactions and Kerr-like medium

N. H. Abdel-Wahab, T. A. S. Ibrahim, Magdy E. Amin

Quantum Information ProcessingMar 4, 202410 citations

The entanglement of two dipole–dipole coupled atoms in a cavity interacting with a thermal field

Leisa Lopes Aguiar, Pablo Parmezani Munhoz, A. Vidiella-Barranco +1 more

We investigate the entanglement properties of a system of two dipole–dipole coupled two-level atoms resonantly interacting with a thermal field in a high- Q cavity. We obtain the evolution operator for this system in an analytical form, and use it to evaluate the atom–atom entanglement through the calculation of the negativity. We find that, despite the destructive effect of thermal noise, the dipole interaction yields a considerable amount of entanglement between the two atoms.

Journal of Optics B Quantum and Semiclassical OpticsNov 23, 200544 citations

The entanglement of two dipole-dipole coupled atoms induced by nondegenerate two-mode thermal noise

Eugene K. Bashkirov, Мария Петровна Ступацкая

We investigate the entanglement properties of a system of two dipole-dipole coupled two-level atoms resonantly interacting with a two-mode thermal field in a high- Q cavity. We obtain the evolution operator for this system in an analytical form, and use it to evaluate the atom-atom entanglement through the calculation of the negativity. The results show that the atom-atom entanglement is dependent on cavity field intensity and dipole interaction strength. We find that the dipole interaction can produce a considerable amount of entanglement between the two atoms.We investigate the entanglement properties of a system of two dipole-dipole coupled two-level atoms resonantly interacting with a two-mode thermal field in a high- Q cavity. We obtain the evolution operator for this system in an analytical form, and use it to evaluate the atom-atom entanglement through the calculation of the negativity. The results show that the atom-atom entanglement is dependent on cavity field intensity and dipole interaction strength. We find that the dipole interaction can produce a considerable amount of entanglement between the two atoms.

Laser PhysicsMar 1, 200937 citations

Entanglement Between Two Dipole-Coupled Qubits Interacting with Two Independent Slightly Detuned Cavity Modes

Eugene K. Bashkirov

International Journal of Theoretical PhysicsMay 24, 20199 citations

Entangled atoms in a cavity with an electromagnetic field

Natália M. Alvarenga, Cesar Augusto Linhares, José André Lourenço +2 more

The European Physical Journal PlusApr 21, 20250 citations

Thermal entanglement of two atoms with dipole-dipole and Ising interactions

Eugene K. Bashkirov

In this paper, we investigated the entanglement dynamics between two two-level natural or artificial atoms interacting with a thermal one-mode field of lossless cavity taking into account the direct dipole-dipole and Ising coupling. We obtained the exact solution for time-dependent density matrix and calculated atom-atom negativity. The results showed that for dipole-uncoupled atoms and resonant atoms-field interaction the entanglement greatly enhances with Ising coupling increasing. In contrast, for model with non-zero detuning the Ising coupling has almost no effect on the degree of entanglement. We also derived that for resonant interaction and dipole-coupled atoms the anti-Ferromagnetic coupling produces a slightly higher degree of entanglement in comparison with the Ferromagnetic coupling. For entangled initial atomic states we obtained that Ising coupling interaction has effect on entanglement behavior only for a model with large detuning values.In this paper, we investigated the entanglement dynamics between two two-level natural or artificial atoms interacting with a thermal one-mode field of lossless cavity taking into account the direct dipole-dipole and Ising coupling. We obtained the exact solution for time-dependent density matrix and calculated atom-atom negativity. The results showed that for dipole-uncoupled atoms and resonant atoms-field interaction the entanglement greatly enhances with Ising coupling increasing. In contrast, for model with non-zero detuning the Ising coupling has almost no effect on the degree of entanglement. We also derived that for resonant interaction and dipole-coupled atoms the anti-Ferromagnetic coupling produces a slightly higher degree of entanglement in comparison with the Ferromagnetic coupling. For entangled initial atomic states we obtained that Ising coupling interaction has effect on entanglement behavior only for a model with large detuning values.

Saratov Fall Meeting: Laser Physics, Photonic Technologies, and Molecular ModelingApr 29, 20223 citations

The entanglement of two dipole-dipole coupled atoms in a cavity interacting with a thermal field

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The entanglement of two dipole-dipole coupled atoms in a cavity interacting with a thermal field

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