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

Journal of Hubei University of Technology

Linear Entropies of a Two-level Atom Interacting with Strong Coherent Field

Zhao Jie

Published Jan 1, 2007• 0 citations
OpenAlex

Abstract

Under a weakly coherent field,the linear entropies of atom and field in a two-level atom-field coupling system are investigated.The effects of the atomic initial state on two linear entropies are discussed.The results show that atom and field entropies are influenced by the initial purity of atom and the ground state probability.The atom and field entropies are identical while the atom initially in the ground state,the atom and field show a strong negative correlation while atom is initially in mixed state.

Related papers

Evolution Feature of Linear Entropies of Atom Interacting with Photon-added Coherent Field

Dahai Xu

The linear entropies of atom and photon-added coherent field in a two-level atom-field coupling system are investigated.The results show that atomic linear entropy is influenced by the ground state probability when the filed is weakly.For a strong filed,the phenomenon of revival and collapse is also appeared in the atomic linear entropy.With the increasing of the mean photon number,the revival period increase.The atom collapses to a unique pure state regardless of the initial atomic conditions.

Journal of Jianghan University•Jan 1, 2007•0 citations

Effect of atomic decay on purity, total correlations and entanglement of pure and mixed states

H. A. Hessian

The atomic decay for a two level atom interacting with a single mode of electromagnetic field is considered. In particular for a coherent state or statistical mixture (SM) of two opposite coherent states as initial field states, the exact solution of the master equation is found. Effect of the atomic damping on the partial entropies of the atom or the field and the total entropy as a measures of the purity loss is investigated. The degree of entanglement by the negativity and the mutual information and the atomic coherence through the master equation is studied.

Journal of the Egyptian Mathematical Society•Jul 1, 2012•0 citations

The properties of linear entropy in the J-C model with large detuning inside a phase cavity in the process of double photons

Chao Dong

The evolution of the linear entropies of the field,atoms and field-atoms coupling system in the system of two completely identical two-level atoms inside a phase-damping cavity interacting with a coherent field under large detuning are investigated.The effects of atomic initial state,the mean photon number of the field and the dissipation coefficient on the above linear entropies are discussed.The results show that the linear entropies of both the field and the atom are strongly dependent on the atomic initial state,but the evolution of the linear entropy of the system is independent of the atomic initial preparation.With the increasing of the mean photon number,the linear entropies of field,atoms and field-atoms increase;And the larger the dissipation,the more rapid the linear entropies of the field and system tend to the certain degree of mixture,but the linear entropies of atoms don't vary with the dissipation coefficient.

Jiguang zazhi•Jan 1, 2004•0 citations

Entropy property in the system of a single-mode field interacting with two two-level atoms

Zhang Li-hu, Gao‐xiang Li

The time evolution of linear entropy of atom-field coupling system, atom and field in the system of two two-level atoms inside a single-mode cavity with amplitude-damping under the condition of large detuning were investigated. The effects of the initial preparation of two atoms, the decay rate of cavity field and the mean photon number of field on all kinds of linear entropy were discussed. The results show that if both the two atoms are in their excited states or ground states, all the linear entropies equal to zero. But when the two atoms are in their coherent superposition state of excited state and ground state, the cavity dissipation will lead to the system to evolve into a mixed state, the linear entropy of atom and field exhibits periodic oscillations with damped amplitude.

Chinese Journal of Quantum Electronics•Jan 1, 2004•0 citations

Atomic Linear Entropies of a Cascade Three-level Atom Interacting with Two-mode Phone Field

Jing Li

In this paper the author studies the time evolution of atomic linear entropies in the field-atom coupling system of a three-level atom interacting with two-mode photon field.The effect of the intensity coupling of field with the atom and the system's initial state on atomic linear entropies is also discussed.

Journal of Huaiyin Institute of Technology•Jan 1, 2007•0 citations

Linear entropy evolution in a dissipative system of two atoms and cavity field

Xiong Yang, Zhao-Yang Tong, Shao-Hua Xiang +1 more

Some investigations have been made on the evolution of the linear entropies of atom-field system, in which two identical two-level atoms simultaneously interact with a single-mode dissipative cavity field under large detuning. The effects of the initial atom states and the dissipative factors of the cavity on all linear entropies are also discussed. The results show that the influence of the cavity decay constant on different kinds of Bell states is completely different, and the state |Ψ〉12 is a robust entangled state against the decoherence while the state |Φ〉12 is a fragile entangled state.

Acta Physica Sinica•Jan 1, 2007•1 citation
Under a weakly coherent field,the linear entropies of atom and field in a two-level atom-field coupling system are investigated.The effects of the atomic initial state on two linear entropies are discussed.The results show that atom and field entropies are influenced by the initial purity of atom and the ground state probability.The atom and field entropies are identical while the atom initially in the ground state,the atom and field show a strong negative correlation while atom is initially in mixed state.
The atomic decay for a two level atom interacting with a single mode of electromagnetic field is considered. In particular for a coherent state or statistical mixture (SM) of two opposite coherent states as initial field states, the exact solution of the master equation is found. Effect of the atomic damping on the partial entropies of the atom or the field and the total entropy as a measures of the purity loss is investigated. The degree of entanglement by the negativity and the mutual information and the atomic coherence through the master equation is studied.
The evolution of the linear entropies of the field,atoms and field-atoms coupling system in the system of two completely identical two-level atoms inside a phase-damping cavity interacting with a coherent field under large detuning are investigated.The effects of atomic initial state,the mean photon number of the field and the dissipation coefficient on the above linear entropies are discussed.The results show that the linear entropies of both the field and the atom are strongly dependent on the atomic initial state,but the evolution of the linear entropy of the system is independent of the atomic initial preparation.With the increasing of the mean photon number,the linear entropies of field,atoms and field-atoms increase;And the larger the dissipation,the more rapid the linear entropies of the field and system tend to the certain degree of mixture,but the linear entropies of atoms don't vary with the dissipation coefficient.
The time evolution of linear entropy of atom-field coupling system, atom and field in the system of two two-level atoms inside a single-mode cavity with amplitude-damping under the condition of large detuning were investigated. The effects of the initial preparation of two atoms, the decay rate of cavity field and the mean photon number of field on all kinds of linear entropy were discussed. The results show that if both the two atoms are in their excited states or ground states, all the linear entropies equal to zero. But when the two atoms are in their coherent superposition state of excited state and ground state, the cavity dissipation will lead to the system to evolve into a mixed state, the linear entropy of atom and field exhibits periodic oscillations with damped amplitude.
Some investigations have been made on the evolution of the linear entropies of atom-field system, in which two identical two-level atoms simultaneously interact with a single-mode dissipative cavity field under large detuning. The effects of the initial atom states and the dissipative factors of the cavity on all linear entropies are also discussed. The results show that the influence of the cavity decay constant on different kinds of Bell states is completely different, and the state |Ψ〉12 is a robust entangled state against the decoherence while the state |Φ〉12 is a fragile entangled state.