Relativistic Formulation of the Quantum Theory of Radiation

1949 ◽  
Vol 75 (3) ◽  
pp. 535-535 ◽  
Author(s):  
S. T. Ma
Keyword(s):  
Quantum Theory ◽  
Relativistic Formulation ◽  
Quantum Theory Of Radiation

QUANTUM THEORY OF RADIATION IN LASER PLASMA

2010 ◽  
Vol 24 (22) ◽  
pp. 2317-2325
Author(s):  
WEI LI ◽  
SHIBING LIU ◽  
CHENGXIN YU ◽  
WEI YANG
Keyword(s):  
Quantum Theory ◽  
Numerical Calculation ◽  
Laser Plasma ◽  
Laser Intensity ◽  
Collision Frequency ◽  
Free Electrons ◽  
Radiation Fields ◽  
Quantum Theory Of Radiation ◽  
Lower Collision ◽  
Full Quantum

Based on the Langevin noise approach, a full quantum theory of radiation in laser plasma is explored, where the laser intensity is limited to the range of 1010 W/cm2 to 1012 W/cm2 and the plasma is considered as a homogeneous dielectric background. By numerical calculation, the results show that the radiation is generated from the resonance of the plasma and the emitted rate of photons depends on the angular relation between the directions of radiation fields and the motion of the unbounded free electrons. In addition, the photons are more easily created under the lower collision frequency.

Quantum Theory of Radiation

1991 ◽  
pp. 298-335
Author(s):  
Alberto Galindo ◽  
Pedro Pascual
Keyword(s):  
Quantum Theory ◽  
Quantum Theory Of Radiation

Optical excitation waves in a molecular crystal

1964 ◽  
Vol 282 (1390) ◽  
pp. 433-445 ◽  
Keyword(s):  
Refractive Index ◽  
Quantum Theory ◽  
Excited States ◽  
Molecular Crystal ◽  
Optical Excitation ◽  
Time Dependent ◽  
Hartree Approximation ◽  
Quasi Particle ◽  
Quantum Theory Of Radiation ◽  
Classical Picture

We have used the quantum theory of radiation, within the time-dependent Hartree approximation, to study exciton states of a van der Waals molecular crystal. The radiation variables are eliminated to give a semi-classical picture of molecular dipoles interacting through a retarded potential, and the solutions of the Hartree equations are closely connected with the quasi-particle excited states in Agranovich’s theory. In the Lorentz-Lorenz approximation the crystal has excited states which correspond to both longitudinal and transverse exciton weaves, and the refractive index behaves classically. The paper concludes with a brief discussion of metallic reflexion by dye crystals.

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