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

Chaos Solitons & Fractals

Entropy and entanglement of an effective two-level atom interacting with two quantized field modes in squeezed displaced fock states

Mahmoud Abdel‐Aty, G. M. Abd Al-Kader, A.‐S. F. Obada

Published Oct 1, 2001• 18 citations
Publisher
DOI
10.1016/s0960-0779(00)00215-0

Related papers

Information entropy squeezing of an effective two-level atom controlled by two-mode entangled coherent fields

Xiao Liu

Journal of Atomic and Molecular Physics•Jan 1, 2008•0 citations

Aspects of the Two-Level Atom in Squeezed Displaced Fock States

A.‐S. F. Obada, G M Abdal-Kader, Mahmoud Abdel‐Aty

This paper presents some results on aspects of the two-level atom interacting with a single-mode with the privileged field mode being in the squeezed displaced Fock state (SDFS). The exact results are employed to perform a careful investigation of the temporal evolution of the atomic inversion, entropy and phase distribution. It is shown that the interference between component states leads to non-classical oscillations in the photon number distribution. At the revival time the field is again in the pure state. We have briefly discussed the collapses and revivals of the atomic inversion by studing the evolution of the Q function of the cavity field. We also established the connection between the field entropy and the collapses and revivals of the atomic inversion. We find that the phase probability distribution of the field reflects the collapses and revivals of the level occupation probabilities in most situations. The interaction brings about the symmetrical splitting of the phase probability distribution. The general conclusions reached are illustrated by numerical results.

arXiv:quant-ph/0110061•Physica Scripta•Jan 1, 2001•2 citations

Entropy squeezing for a two-level atom in two-mode Raman coupled model with intrinsic decoherence

Jian Zhang, Shao Bin, Zou Jian

In this paper, we investigate the entropy squeezing for a two-level atom interacting with two quantized fields through Raman coupling. We obtain the dynamical evolution of the total system under the influence of intrinsic decoherence when the two quantized fields are prepared in a two-mode squeezing vacuum state initially. The effects of the field squeezing factor, the two-level atomic transition frequency, the second field frequency and the intrinsic decoherence on the entropy squeezing are discussed. Without intrinsic decoherence, the increase of field squeezing factor can break the entropy squeezing. The two-level atomic transition frequency changes only the period of oscillation but not the strength of entropy squeezing. The influence of the second field frequency is complicated. With the intrinsic decoherence taken into consideration, the results show that the stronger the intrinsic decoherence is, the more quickly the entropy squeezing will disappear. The increase of the atomic transition frequency can hasten the disappearance of entropy squeezing.

Chinese Physics B•Mar 17, 2009•4 citations

Entropy exchange and entanglement of an in motion two-level atom with a quantized field

Xue‐Qun Yan, Bin Shao, Jian Zou

Chaos Solitons & Fractals•Nov 21, 2006•12 citations

Entropy squeezing for a two-level atom in motion interacting with a quantized field

Xiang-Ping Liao, Mao-Fa Fang

Physica A Statistical Mechanics and its Applications•Oct 15, 2003•23 citations

Von Neumann entropy and entropy squeezing of a two-level atom and the superposition of squeezed displaced fock states

G. M. Abd Al-Kader, A.‐S. F. Obada

Journal of Russian Laser Research•Jul 1, 2008•0 citations
This paper presents some results on aspects of the two-level atom interacting with a single-mode with the privileged field mode being in the squeezed displaced Fock state (SDFS). The exact results are employed to perform a careful investigation of the temporal evolution of the atomic inversion, entropy and phase distribution. It is shown that the interference between component states leads to non-classical oscillations in the photon number distribution. At the revival time the field is again in the pure state. We have briefly discussed the collapses and revivals of the atomic inversion by studing the evolution of the Q function of the cavity field. We also established the connection between the field entropy and the collapses and revivals of the atomic inversion. We find that the phase probability distribution of the field reflects the collapses and revivals of the level occupation probabilities in most situations. The interaction brings about the symmetrical splitting of the phase probability distribution. The general conclusions reached are illustrated by numerical results.
In this paper, we investigate the entropy squeezing for a two-level atom interacting with two quantized fields through Raman coupling. We obtain the dynamical evolution of the total system under the influence of intrinsic decoherence when the two quantized fields are prepared in a two-mode squeezing vacuum state initially. The effects of the field squeezing factor, the two-level atomic transition frequency, the second field frequency and the intrinsic decoherence on the entropy squeezing are discussed. Without intrinsic decoherence, the increase of field squeezing factor can break the entropy squeezing. The two-level atomic transition frequency changes only the period of oscillation but not the strength of entropy squeezing. The influence of the second field frequency is complicated. With the intrinsic decoherence taken into consideration, the results show that the stronger the intrinsic decoherence is, the more quickly the entropy squeezing will disappear. The increase of the atomic transition frequency can hasten the disappearance of entropy squeezing.