Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Physics of Wave Processes and Radio Systems

Entanglement of Two Dipole-Coupled Atoms

Eugene K. Bashkirov, Башкиров Евгений Константинович, M P Spupatskaya, Мария Петровна Ступацкая

Published Jun 15, 2009• 1 citation
OpenAlex

Abstract

In the present paper the entanglement of two atoms with dipole interaction induced by two-mode thermal field in ideal cavity has been investigated. The exact analytical formula for evolution operator of system considered has been derived. On its basis the Peres-Horodetski entanglement parameter has been calculated. It has been shown that, despite the destructive nature of thermal noise, dipole interaction leads to a high degree of atomic entanglement.

Related papers

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.

Laser Physics•Mar 1, 2009•37 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 Optics•Nov 23, 2005•44 citations

Entanglement induced by two-mode thermal noise taking into account the dipole-dipole interaction and atomic coherence

Eugene K. Bashkirov, Ekaterina Gennadievna Mangulova

The entanglement of two two-level atoms with the nondegenerate two-photon transitions interacting with two-mode thermal field in lossless cavity has been considered. The possibility of entanglement degree growth in the presence of an atomic coherence and direct dipole-dipole interaction of atoms has been derived.

•Jun 1, 2013•1 citation

Entanglement between atom interacting with a thermal field of a lossless cavity and a free atom

Eugene K. Bashkirov, Башкиров Е. К, Maria O. Guslyannikova +1 more

In the present paper we studied the entanglement of a quantum system consisting of two dipole-coupled two-level atoms, one of which interacts with one-mode thermal field in a lossless cavity, and another is outside a cavity. We obtained the analytical expression of the atom-atom negativity for separable initial atomic state and investigated the influence of a detuning between the atom and the field frequencies and direct dipole-dipole interaction on an atom-atom entanglement. We derived that detuning might cause high atom-atom entanglement in the presence of the dipole-dipole interaction. We also showed that the detuning and dipole-dipole interaction are an effective mechanisms for control and operation of the atomic entanglement.

Physics of Wave Processes and Radio Systems•Dec 15, 2018•0 citations

Entanglement of two dipole-coupled qubits induced by a detuned thermal field

Eugene K. Bashkirov

In this paper we have investigated the dynamics of entanglement of two identical qubits non-resonantly interacting with one mode of a vacuum or a thermal electromagnetic field in lossless cavity in the presence of a direct dipole-dipole interaction. Based on the exact solution to the equation used in this analysis, the Peres-Horodecki entanglement parameter (negativity) for qubits has been found. Numerical simulation of the negativity for various model parameters has been carried out. It has been shown that the interactions of qubits with a thermal field in a cavity can lead to their entanglement. It has been established that the detuning and dipole-dipole interaction of qubits can be used to manipulate and control the amount of atomic entanglement.

Journal of Physics Conference Series•Sep 1, 2018•0 citations

DYNAMICS OF TWO-LEVEL ATOMS INTERACTING WITH THERMAL FIELD FOR ENTANGLED INITIAL ATOMIC STATES

Eugene K. Bashkirov, Alevtina Solovieva, Michail S. Mastyugin

In this paper the entanglement dynamics for system of two two-level atoms interacting with a mode of thermal electromagnetic field in lossless cavity has been investigated. Initial atomic states are the entangled Bell type states. Using the full set of eigenvectors of the Hamiltonian of the considered model we have derived the exact solution for the density matrix for the whole system. On its basis the reduced atomic density matrix and Peres - Horodetcki parameter have been calculated. Calculating of entanglement parameter shows the possibility of high degree of entanglement even for large intensity of thermal field. Thus there is a possibility of maintenance and control over the degree of entanglement.

Vestnik of Samara University Natural Science Series•Dec 17, 2015•0 citations
In the present paper the entanglement of two atoms with dipole interaction induced by two-mode thermal field in ideal cavity has been investigated. The exact analytical formula for evolution operator of system considered has been derived. On its basis the Peres-Horodetski entanglement parameter has been calculated. It has been shown that, despite the destructive nature of thermal noise, dipole interaction leads to a high degree of atomic entanglement.
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.
In the present paper we studied the entanglement of a quantum system consisting of two dipole-coupled two-level atoms, one of which interacts with one-mode thermal field in a lossless cavity, and another is outside a cavity. We obtained the analytical expression of the atom-atom negativity for separable initial atomic state and investigated the influence of a detuning between the atom and the field frequencies and direct dipole-dipole interaction on an atom-atom entanglement. We derived that detuning might cause high atom-atom entanglement in the presence of the dipole-dipole interaction. We also showed that the detuning and dipole-dipole interaction are an effective mechanisms for control and operation of the atomic entanglement.
In this paper we have investigated the dynamics of entanglement of two identical qubits non-resonantly interacting with one mode of a vacuum or a thermal electromagnetic field in lossless cavity in the presence of a direct dipole-dipole interaction. Based on the exact solution to the equation used in this analysis, the Peres-Horodecki entanglement parameter (negativity) for qubits has been found. Numerical simulation of the negativity for various model parameters has been carried out. It has been shown that the interactions of qubits with a thermal field in a cavity can lead to their entanglement. It has been established that the detuning and dipole-dipole interaction of qubits can be used to manipulate and control the amount of atomic entanglement.
In this paper the entanglement dynamics for system of two two-level atoms interacting with a mode of thermal electromagnetic field in lossless cavity has been investigated. Initial atomic states are the entangled Bell type states. Using the full set of eigenvectors of the Hamiltonian of the considered model we have derived the exact solution for the density matrix for the whole system. On its basis the reduced atomic density matrix and Peres - Horodetcki parameter have been calculated. Calculating of entanglement parameter shows the possibility of high degree of entanglement even for large intensity of thermal field. Thus there is a possibility of maintenance and control over the degree of entanglement.