Two-level atom and quantum system entanglement and squeezing with and without classical field and damping effects

2020 ◽  
Vol 38 (3) ◽  
pp. 2817-2822
Author(s):  
E. M. Khalil ◽  
S. Abdel-Khalek ◽  
Saud Al-Awfi ◽  
M. Rasulova
Keyword(s):  
Quantum System ◽  
Classical Field ◽  
Level Atom ◽  
Damping Effects

scholarly journals Information Entropy Squeezing and Non-local Correlation Between a Two-Level Atom and Two-Mode Field Under the Classical Field Effect

2020 ◽  
Vol 8 ◽  
Author(s):  
E. M. Khalil ◽  
Sayed Abdel-Khalek ◽  
Waad Albogami ◽  
Jamel Bouslimi ◽  
Sayed M. Abo-Dahab ◽  
...  
Keyword(s):  
Information Entropy ◽  
Field Effect ◽  
Classical Field ◽  
Local Correlation ◽  
Entropy Squeezing ◽  
Mode Field ◽  
Level Atom ◽  
Non Local

scholarly journals QUANTUM TRAJECTORIES, FEEDBACK AND SQUEEZING

2008 ◽  
Vol 06 (supp01) ◽  
pp. 581-587 ◽  
Author(s):  
A. BARCHIELLI ◽  
M. GREGORATTI ◽  
M. LICCIARDO
Keyword(s):  
Quantum System ◽  
Quantum Trajectory ◽  
Quantum Trajectories ◽  
Control Parameters ◽  
Homodyne Detection ◽  
Level Atom ◽  
Feedback Scheme ◽  
Fluorescence Light ◽  
Set Up

Quantum trajectory theory is the best mathematical set up to model continual observations of a quantum system and feedback based on the observed output. Inside this framework, we study how to enhance the squeezing of the fluorescence light emitted by a two-level atom, stimulated by a coherent monochromatic laser. In the presence of a Wiseman-Milburn feedback scheme, based on the homodyne detection of a fraction of the emitted light, we analyze the squeezing dependence on the various control parameters.

scholarly journals Influence of classical field on entanglement and photon statistics of n-level atom interacting with a two two-level atom

2020 ◽  
Vol 24 (Suppl. 1) ◽  
pp. 177-186
Author(s):  
Hammad Alotaibi ◽  
Eied Khalil ◽  
Sayed Abdel-Khalek ◽  
Abdullah Al-Barakaty
Keyword(s):  
External Field ◽  
Equation Of Motion ◽  
Classical Field ◽  
The Other ◽  
Photon Statistics ◽  
Heisenberg Equation ◽  
Initial State ◽  
N Level ◽  
Level Atom ◽  
Interacting Atoms

In this study, we consider three interacting atoms, one of them represented by N-level atom based on SU(2) Lie algebra and the other represented by a two two-level atom in presence of the external field. The effect of the external field on the dynamics of the proposed system is discussed in detail for certain values for the external field. The dynamical expression of the observable operators is obtained by using the Heisenberg equation of motion. The general solution via solving Schrodinger equation is obtained. The fidelity and concurrence formula as a measure of entanglement between two two-level atom are calculated and discussed in detail. We explore the sudden death and sudden birth phenomena with and without the presence of external field. Finally, we compare the results of the fidelity, concurrence and second-order correlation function for some values of the initial state and the external field parameters.

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