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 in multi-photon Tavis - Cummings model induced by a thermal noise

Eugene K. Bashkirov, Башкиров Е. К

Published Jun 15, 2018• 1 citation
OpenAlex

Abstract

In this paper we have investigated the dynamics of entanglement of two natural or artificial two-level atoms interacting through multiphoton transitions with a thermal field of an lossless microwave cavity. On the basis of the exact solution of the model under consideration, the atom-atom entanglement parameter for various initial separable and entangled states of atoms are found. It is shown that the interaction of atoms with the thermal field of the cavity by means of multiphoton transitions can induce entanglement for all states except for the one in which both atoms are excited. It is also established that for the initial separable states of atoms the maximum degree of entanglement increases with the multiplicity of atomic transitions.

Related papers

Entanglement between artificial atoms and photons of lossless cavities

Eugene K. Bashkirov, Maria O. Guslyannikova

We investigated the dynamics of atom-field entanglement for two natural or artificial two-level atoms interacting with a one-mode quantum electromagnetic field by means of multiphoton transitions in a lossless cavity. Tavis-Cummings model is used to describe the interaction of the atoms and real microwave coplanar cavity field. We carried out the mathematical modeling of the dynamics of the system under consideration for various initial states of the atomic subsystem and an intensive coherent field of the cavity. We showed that for small multiplicities, the atoms and the field, which were initially in a pure separable state, can return to this state during the evolution. We also found that for large multiplicities the atoms and the field are in the entangled atom-field state in the process of the system evolution with the exception of the initial time instant. These results can be used in the theory of quantum networks.

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

Atom-atom entanglement in a not-resonant two-photon Tavis-Cummings model

Maria O. Guslyannikova, Eugene K. Bashkirov

The entanglement between two two-level atoms (qubits) interacting not-resonantly with a one mode of thermal field in a lossless cavity via effective degenerate two-photon transitions is investigated. Based on the exact solution for the time-dependent density matrix of the system under consideration, negativity is calculated as a measure of the entanglement of atoms. The influence of a detuning on the dynamics of entanglement of atoms for separable and entangled initial atomic states and thermal cavity state is investigated.

EPJ Web of Conferences•Jan 1, 2019•0 citations

Entanglement in nondegenerate two-photon Tavis-Cummings model with atomic coherence

Eugene K. Bashkirov, Michael S. Mastuygin

The entanglement of two dipole-coupled atoms with nondegenerate two-photon transitions interacting with twomode 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 dipoledipole interaction is shown in the case of great mean values of thermal photons.

Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE•Feb 26, 2013•1 citation

Entanglement in two-atom Tavis-Cummings model with Raman transitions

Eugene K. Bashkirov

An exact solution of the problem of two two-level atoms with degenerate Raman two-photon transitions interacting with one-mode coherent or thermal radiation field in cavity is presented. Asymptotic solution for system state vector is obtained in the approximation of large initial coherent fields. The atom-field 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 is shown. Conditions and times of disentanglement are derived. The atom-atom entanglement is investigated with using negativity. The possibility of sudden death and birth of atom-atom entanglement is predicted for a coherent field with large mean photon numbers.

Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE•Apr 14, 2017•0 citations

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

Eugene K. Bashkirov, Michail S. Mastuygin

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.

arXiv:1210.3685•Oct 13, 2012•1 citation

Thermal entanglement in Tavis–Cummings model with Kerr nonlinearity

Mikhail M. Evseev, Eugene K. Bashkirov

In this paper, we investigate entanglement between two two-level atoms when they simultaneously interact with a single-mode thermal field of a lossless cavity with Kerr medium. We show that a slight Kerr nonlinearity might enhance the degree of entanglement between the atoms. More interestingly, both atoms would somehow get entangled even when both atoms are initially in the excited state.

International Conference on Information Technology and Nanotechnology (ITNT)•May 26, 2020•5 citations
In this paper we have investigated the dynamics of entanglement of two natural or artificial two-level atoms interacting through multiphoton transitions with a thermal field of an lossless microwave cavity. On the basis of the exact solution of the model under consideration, the atom-atom entanglement parameter for various initial separable and entangled states of atoms are found. It is shown that the interaction of atoms with the thermal field of the cavity by means of multiphoton transitions can induce entanglement for all states except for the one in which both atoms are excited. It is also established that for the initial separable states of atoms the maximum degree of entanglement increases with the multiplicity of atomic transitions.
We investigated the dynamics of atom-field entanglement for two natural or artificial two-level atoms interacting with a one-mode quantum electromagnetic field by means of multiphoton transitions in a lossless cavity. Tavis-Cummings model is used to describe the interaction of the atoms and real microwave coplanar cavity field. We carried out the mathematical modeling of the dynamics of the system under consideration for various initial states of the atomic subsystem and an intensive coherent field of the cavity. We showed that for small multiplicities, the atoms and the field, which were initially in a pure separable state, can return to this state during the evolution. We also found that for large multiplicities the atoms and the field are in the entangled atom-field state in the process of the system evolution with the exception of the initial time instant. These results can be used in the theory of quantum networks.
The entanglement between two two-level atoms (qubits) interacting not-resonantly with a one mode of thermal field in a lossless cavity via effective degenerate two-photon transitions is investigated. Based on the exact solution for the time-dependent density matrix of the system under consideration, negativity is calculated as a measure of the entanglement of atoms. The influence of a detuning on the dynamics of entanglement of atoms for separable and entangled initial atomic states and thermal cavity state is investigated.
An exact solution of the problem of two two-level atoms with degenerate Raman two-photon transitions interacting with one-mode coherent or thermal radiation field in cavity is presented. Asymptotic solution for system state vector is obtained in the approximation of large initial coherent fields. The atom-field 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 is shown. Conditions and times of disentanglement are derived. The atom-atom entanglement is investigated with using negativity. The possibility of sudden death and birth of atom-atom entanglement is predicted for a coherent field with large mean photon numbers.