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

The influence of atomic coherence on entanglement of atoms with two-photon transitions taking into account the dynamical Stark shift

Eugene K. Bashkirov, M.S. Mastyugin

Published Feb 1, 2014• 0 citations
OpenAlex

Abstract

In this paper we investigated the entanglement dynamics of two atoms interacting with mode of quantum electromagnetic field via degenerate two-photon transitions taking into account the Stark shift. We considered the initial coherent disentangled atomic states and field Fock states. We shown the possibility of the control of degree of atomic entanglement due to the Stark shift and the atomic coherence.

Related papers

The dynamics of entangled atoms with two-photon transitions taking into account the Stark shift of energy levels

Eugene K. Bashkirov, Башкиров Е. К, Michail S. Mastyugin +1 more

The influence of Stark shift on atom-atom entanglement of two identical atoms interacting with mode of electromagnetic field in lossless cavity via degenerate two-photon transitions has been investigated. The possibility of control of the degree of atomic entanglement and the disappearance of entanglement sudden death effect due to Stark shift has been shown.

Physics of Wave Processes and Radio Systems•Mar 15, 2014•0 citations

The entanglement of atoms with two-photon transitions in the presence of ac Stark shift of energy levels

Eugene K. Bashkirov, Башкиров Е. К

In this paper, we investigated the dynamics of atomic entanglement in a quantum system consisting of two identical two-level atoms (qubits) resonantly interacting with a mode of a thermal cavity field through degenerate two-photon transitions, in the presence of a Stark energy level shift. An analytical expression is obtained for the atom entanglement (negativity) parameter for separable and entangled initial states of atoms. The influence of the Stark shift on the degree of atom-atom entanglement is considered. It is established that the Stark shift leads to a significant increase in the degree of atom entanglement in the case of separable initial states of atoms and to stabilization of atomic entanglement in the case of entangled initial states of atoms.

Physics of Wave Processes and Radio Systems•Mar 1, 2019•1 citation

ENTANGLEMENT OF ATOMS SUCCESIVELY PASSING A CAVITY TAKING INTO ACCOUNT THE STARK SHIFT

Eugene K. Bashkirov

In the article we consider the influence of dynamical Stark shift on entanglement degree of two atoms with degenerate two-photon transitions successively passing an ideal one-mode cavity. We suppose that the field be prepared in vacuum state and the atoms be prepared in coherent superposition of excited and ground states. Thus it was also supposed that atoms fly by the cavity for identical time. On the basis of exact expression of evolution operator we carried out atom-atom entanglement for different values of two-atom coherence parameters and different values of cavity flight time. It is shown that Stark shift of energy levels can be used for effective control on a degree of atomic entanglement.

Vestnik of Samara University Natural Science Series•Nov 30, 2014•0 citations

Entanglement between two atoms taking into account a Stark shift

Maria O. Guslyannikova, Eugene K. Bashkirov

We considered a quantum model consisting of two effective two-level atoms interacting with a single-mode thermal cavity field through two-photon transitions. We explored the entanglement dynamics between two atoms, and studied the effect of the Stark shift on the entanglement. The results showed that for a separable initial atomic state the Stark shift enhances the amount of atom-atom entanglement induced by the thermal field. For entangled atomic state the Stark shift reduces the the atom-atom entanglement oscillations.

Saratov Fall Meeting: Laser Physics, Photonic Technologies, and Molecular Modeling•Jun 3, 2019•0 citations

Influence of Stark Shift on Entanglement of Two Qubits in the Two-Photon Tavis-Cummings Model

Michail S. Mastyugin, Eugene K. Bashkirov

Considering two-atom degenerate two-photon Tavis-Cummings model, we investigate the entanglement between two atoms prepared initially in the coherent disentangled states and cavity field prepared in few-photon Fock state, and study the effect of the Stark shift on entanglement. The results show that the atom–atom negativity evolve periodically with time and the periods are affected by the Stark shift and initial coherent atomic state and that the atom–atom entanglement can be greatly enhanced due to the presence of Stark shift. We also have shown that entanglement sudden death effect vanishes for some parameters of the considered system due to the presence of Stark shift. In addition, the entanglement sudden death effect vanishes due to the presence of Stark shift. We have derived that the dynamic Stark shift can be used to control entanglement between two initially disentangled atoms.

EPJ Web of Conferences•Jan 1, 2015•0 citations

Influence of Stark shift and atomic coherence on entanglement of two qubits

Eugene K. Bashkirov, Michail S. Mastuygin

In this paper we have investigated the atom-atom entanglement for degenerate two-photon Tavis-Cummings model with taking into account Stark shift and initial atomic coherence. Considering different initial coherent states we have derived that the atom-atom entanglement can be greatly increased or decreased due to the presence of the Stark shift. In addition, we have derived that the entanglement sudden death effect vanishes due to the presence of Stark shift for some initial states.

Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE•Mar 19, 2015•0 citations
In this paper we investigated the entanglement dynamics of two atoms interacting with mode of quantum electromagnetic field via degenerate two-photon transitions taking into account the Stark shift. We considered the initial coherent disentangled atomic states and field Fock states. We shown the possibility of the control of degree of atomic entanglement due to the Stark shift and the atomic coherence.
In this paper, we investigated the dynamics of atomic entanglement in a quantum system consisting of two identical two-level atoms (qubits) resonantly interacting with a mode of a thermal cavity field through degenerate two-photon transitions, in the presence of a Stark energy level shift. An analytical expression is obtained for the atom entanglement (negativity) parameter for separable and entangled initial states of atoms. The influence of the Stark shift on the degree of atom-atom entanglement is considered. It is established that the Stark shift leads to a significant increase in the degree of atom entanglement in the case of separable initial states of atoms and to stabilization of atomic entanglement in the case of entangled initial states of atoms.
In the article we consider the influence of dynamical Stark shift on entanglement degree of two atoms with degenerate two-photon transitions successively passing an ideal one-mode cavity. We suppose that the field be prepared in vacuum state and the atoms be prepared in coherent superposition of excited and ground states. Thus it was also supposed that atoms fly by the cavity for identical time. On the basis of exact expression of evolution operator we carried out atom-atom entanglement for different values of two-atom coherence parameters and different values of cavity flight time. It is shown that Stark shift of energy levels can be used for effective control on a degree of atomic entanglement.
We considered a quantum model consisting of two effective two-level atoms interacting with a single-mode thermal cavity field through two-photon transitions. We explored the entanglement dynamics between two atoms, and studied the effect of the Stark shift on the entanglement. The results showed that for a separable initial atomic state the Stark shift enhances the amount of atom-atom entanglement induced by the thermal field. For entangled atomic state the Stark shift reduces the the atom-atom entanglement oscillations.
Considering two-atom degenerate two-photon Tavis-Cummings model, we investigate the entanglement between two atoms prepared initially in the coherent disentangled states and cavity field prepared in few-photon Fock state, and study the effect of the Stark shift on entanglement. The results show that the atom–atom negativity evolve periodically with time and the periods are affected by the Stark shift and initial coherent atomic state and that the atom–atom entanglement can be greatly enhanced due to the presence of Stark shift. We also have shown that entanglement sudden death effect vanishes for some parameters of the considered system due to the presence of Stark shift. In addition, the entanglement sudden death effect vanishes due to the presence of Stark shift. We have derived that the dynamic Stark shift can be used to control entanglement between two initially disentangled atoms.