THE TWO-ATOM DICKE MODEL IN A SQUEEZED VACUUM: THE FLUORESCENT SPECTRUM INCLUDING DIPOLE-DIPOLE INTERACTION

1991 ◽  
Vol 05 (19) ◽  
pp. 3115-3125 ◽  
Author(s):  
R.R. PURI ◽  
AMITABH JOSHI ◽  
R.K. BULLOUGH
Keyword(s):  
Master Equation ◽  
Spectral Characteristics ◽  
Dipole Interaction ◽  
Resonance Fluorescence ◽  
Driving Field ◽  
Squeezed Vacuum ◽  
Fluorescent Spectrum ◽  
Analytic Expressions ◽  
Atomic Dipole ◽  
Dicke Model

The spectrum of resonance fluorescence from a system of two identical coherently driven two-level atoms interacting with a broadband squeezed bath is studied by including the atomic dipole-dipole interaction. The spectral characteristics are studied by solving the master equation numerically and also by deriving the analytic expressions in the limit of strong driving field.

ON THE NATURE OF FLUORESCENT SPECTRUM OF A TWO ATOM DICKE MODEL IN A NARROW BANDWIDTH SQUEEZED BATH

1994 ◽  
Vol 08 (01n02) ◽  
pp. 121-135 ◽  
Author(s):  
AMITABH JOSHI ◽  
R. R. PURI
Keyword(s):  
Master Equation ◽  
Dipole Interaction ◽  
Spectral Features ◽  
Resonance Fluorescence ◽  
Driving Field ◽  
Narrow Bandwidth ◽  
Fluorescent Spectrum ◽  
Atomic Dipole ◽  
Dicke Model ◽  
Finite Bandwidth

We discuss the spectrum of resonance fluorescence from a system of two identical coherently driven two-level atoms interacting with a finite bandwidth squeezed bath, including the atomic dipole-dipole interaction between the atoms. The characteristics of the spectral features are studied by solving the master equation analytically in the limit of strong driving field. The comparison of these features with respect to an ordinary bath as well as broadband squeezed bath are also presented.

Resonance fluorescence with bichromatic excitation and nonresonant squeezed reservoir: iterative approach

2012 ◽  
Vol 90 (5) ◽  
pp. 449-460 ◽  
Author(s):  
S.S. Hassan ◽  
R.A. Alharbey
Keyword(s):  
Field Strength ◽  
Numerical Solutions ◽  
Absolute Difference ◽  
Iterative Approach ◽  
Resonance Fluorescence ◽  
System Parameters ◽  
Squeezed Vacuum ◽  
Level Atom ◽  
Bichromatic Field ◽  
Fluorescent Spectrum

An iterative approach, not restricted to field strength nor to resonance conditions, is used to solve the nonautonomous Bloch equations modeling the interaction of a bichromatically driven two-level atom in the presence of an off-resonant broadband squeezed vacuum (SV) radiation reservoir. The system parameters are chosen such that the absolute difference between the iterative and (exact) numerical solutions is [Formula: see text](10−2) or less. For some limiting cases, range of validity of the iterative procedure is estimated analytically. The derived analytical solutions are used to calculate the transient fluorescent spectrum. Some previously obtained results (both experimental and theoretical) in the normal vacuum case are recovered. In the SV case, with strong resonant (off-resonant) bichromatic field strength, the transient spectrum shows many symmetrical (asymmetrical) resonances of weights and locations dependent on the SV detuning parameter.

Side bands in collective resonance fluorescence

1985 ◽  
Vol 63 (3) ◽  
pp. 335-338
Author(s):  
H. R. Zaidi
Keyword(s):  
Fluorescence Spectrum ◽  
Line Width ◽  
Rabi Frequency ◽  
Interaction Model ◽  
Dipole Interaction ◽  
Markov Approximation ◽  
Resonance Fluorescence ◽  
Pump Field ◽  
Field Frequency ◽  
Side Band

The fluorescence spectrum of a system of strongly driven atoms, contained in a region that is small compared with the wavelength, is calculated using a screened interaction model. Coulomb dipole–dipole interaction is neglected, but a Markov approximation is not made. The side bands at ω′ = ω ± Ω and ω ± 2Ω are investigated in detail (ω′(ω) is the emitted photon (pump field) frequency; Ω is the Rabi frequency). The intensity and line width of the side bands at ω ± 2Ω is reduced owing to S breaking in our model. Non-Markovian corrections split the side band at ω ± Ω.

scholarly journals Microscopic analysis of homogeneous electron gas by considering dipole–dipole interaction

2017 ◽  
Vol 31 (35) ◽  
pp. 1750334 ◽  
Author(s):  
G. H. Bordbar ◽  
F. Pouresmaeeli
Keyword(s):  
Angular Momentum ◽  
Total Angular Momentum ◽  
Electron Gas ◽  
Microscopic Analysis ◽  
Dipole Interaction ◽  
Angular Momenta ◽  
State Dependent ◽  
Analytic Expressions ◽  
Quantization Formalism ◽  
The Impact

Implying perturbation theory, the impact of the dipole–dipole interaction (DDI) on the thermodynamic properties of a homogeneous electron gas at zero temperature is investigated. Through the second quantization formalism, the analytic expressions for the ground state energy and the DDI energy are obtained. In this paper, the DDI energy has similarities with the previous works done by others. We show that its general behavior depends on density and the total angular momentum. Especially, it is found that the DDI energy has a highly state-dependent behavior. With the growth of density, the magnitude of DDI energy, which is found to be the summation of all energy contributions of the states with even and odd total angular momenta, grows linearly. It is also found that for the states with even and odd total angular momenta, the DDI energy contributions are corresponding to the positive and negative values, respectively. In particular, an increase of total angular momentum leads to decline in the magnitude of energy contribution. Therefore, the dipole–dipole interaction reveals distinct characteristics in comparison with central-like interactions.

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