Quantum mutual entropy of a single four-level atom strongly coupled to a cavity field and driven by a laser field

2007 ◽  
Vol 275 (1) ◽  
pp. 129-134 ◽  
Author(s):  
Mahmoud Abdel-Aty
Keyword(s):  
Laser Field ◽  
Cavity Field ◽  
Strongly Coupled ◽  
Level Atom ◽  
Mutual Entropy

WEHRL ENTROPY OF A MIXED STATE THREE-LEVEL ATOM INTERACTING WITH A CAVITY FIELD

2010 ◽  
Vol 09 (06) ◽  
pp. 623-630
Author(s):  
S. ABDEL-KHALEK ◽  
Y. HASSOUNI ◽  
M. ABDEL-ATY
Keyword(s):  
Mixed State ◽  
Von Neumann Entropy ◽  
Entangled State ◽  
Cavity Field ◽  
Wehrl Entropy ◽  
Von Neumann ◽  
Level Atom ◽  
Total Correlation ◽  
State Case ◽  
Mutual Entropy

In this paper, the Wehrl entropy approach is discussed and compared with the quantum entanglement using a mixed-state three-level atom interacting with a cavity field. In the pure state case, the behavior of the atomic Wehrl entropy shows the same behavior of the entanglement due to the von-Neumann entropy, while the mixed state case gives the total correlation due to quantum mutual entropy. If the system is in an entangled state, the formalism can be used to quantify the entanglement as well as the total correlations.

scholarly journals ac Stark Shift and Dephasing of a Superconducting Qubit Strongly Coupled to a Cavity Field

2005 ◽  
Vol 94 (12) ◽  
Author(s):  
D. I. Schuster ◽  
A. Wallraff ◽  
A. Blais ◽  
L. Frunzio ◽  
R.-S. Huang ◽  
...  
Keyword(s):  
Stark Shift ◽  
Cavity Field ◽  
Superconducting Qubit ◽  
Strongly Coupled

High-order harmonic emission from a three-level atom in a laser field

1999 ◽  
Vol 46 (5) ◽  
pp. 743-754 ◽  
Author(s):  
Pasquale Caldara ◽  
Emilio Fiordilino
Keyword(s):  
Laser Field ◽  
High Order ◽  
Harmonic Emission ◽  
High Order Harmonic ◽  
Level Atom

The influence of the classical homogenous gravitational field on interaction of a three-level atom with a single mode cavity field

2015 ◽  
Vol 29 (29) ◽  
pp. 1550175 ◽  
Author(s):  
N. H. Abd El-Wahab ◽  
Ahmed Salah
Keyword(s):  
Electromagnetic Field ◽  
Gravitational Field ◽  
Photon Number ◽  
Single Mode ◽  
Temporal Behavior ◽  
Cavity Field ◽  
Text Type ◽  
Level Atom ◽  
The Mean ◽  
Single Mode Cavity

We study the interaction between a single mode electromagnetic field and a three-level [Formula: see text]-type atom in the presence of a classical homogenous gravitational field when the atom is prepared initially in the momentum eigenstate. The model includes the detuning parameters and the classical homogenous gravitational field. The wave function is calculated by using the Schrödinger equation for a coherent electromagnetic field and an atom is in its excited state. The influence of the detuning parameter and the classical homogenous gravitational field on the temporal behavior of the mean photon number, the normalized second-order correlation function and the normal squeezing is analyzed. The results show that the presence of these parameters has an important effect on these phenomena. The conclusion is reached and some features are given.

A FOUR-LEVEL ATOM INTERACTING WITH A SINGLE-MODE CAVITY FIELD: DOUBLE Ξ-CONFIGURATION

2008 ◽  
Vol 22 (26) ◽  
pp. 2587-2599 ◽  
Author(s):  
N. H. ABDEL-WAHAB
Keyword(s):  
Coherent State ◽  
Time Evolution ◽  
Single Mode ◽  
Cavity Field ◽  
Field System ◽  
Input Field ◽  
Level Atom ◽  
Constants Of Motion ◽  
Q Function ◽  
Single Mode Cavity

In this article, the problem of a double Ξ-type four-level atom interacting with a single-mode cavity field is considered. The considered model describes several distinct configurations of a four-level atom. Also, this model includes the detuning parameters of the atom-field system. We obtain the constants of motion and the wavefunction is derived when the atom is initially prepared in the upper state. We used this model for computing a number of the field aspects for the considered system. As an illustration, the model is used for studying the time evolution of the Mandel Q-parameter, amplitude-squared squeezing phenomenon and Q-function when the input field is considered in a coherent state. The results show that these phenomena are affected by the presence of detuning parameters.

EMISSION SPECTRUM OF A TWO-LEVEL ATOM IN AN OPTOMECHANICAL CAVITY

2013 ◽  
Vol 27 (31) ◽  
pp. 1350226
Author(s):  
JI HUI TENG ◽  
HONG FU WANG ◽  
XUE XI YI
Keyword(s):  
Emission Spectrum ◽  
Single Atom ◽  
Coupling Constant ◽  
Cavity Field ◽  
First Order ◽  
Level Atom ◽  
Optomechanical Cavity ◽  
Cavity Mirror

The emission spectrum of a single atom inside an optomechanical cavity is studied in this paper. Our model consists of a single two-level atom coupled to a cavity with a moving end mirror. We numerically calculate the emission spectrum of the atom, taking the effect of the moving mirror into account. The dependence of the spectrum peak on the coupling between the moving mirror and the cavity field is analyzed. For weak cavity-mirror couplings, we expand the spectrum up to the first order of the coupling constant.

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