Density operator approach to the modulation effects in magnetic resonance

1982 ◽  
Vol 46 (2) ◽  
pp. 193-199 ◽  
Author(s):  
Yeong W Kim
Keyword(s):  
Magnetic Resonance ◽  
Density Operator ◽  
Operator Approach

Laser theory with natural inclusion of radiation loss: Density-operator approach

1988 ◽  
Vol 66 (9) ◽  
pp. 764-768 ◽  
Author(s):  
A. Liberato ◽  
B. Baseia
Keyword(s):  
Recent Result ◽  
Density Operator ◽  
Conventional Treatment ◽  
Optical Cavity ◽  
Equation Of Motion ◽  
Operator Approach ◽  
Transmitted Beam ◽  
Laser Theory ◽  
Natural Inclusion ◽  
Natural Way

A recent result of a previous paper describing the field loss in an optical cavity in a natural way is applied to laser theory. The field loss, due to the transmitted beam light, and the field gain, now attributed to the presence of active atoms but previously attributed to two noninteracting mechanisms, are correctly added to provide the equation of motion for the density operator of the radiation field. The replacement of individual operators, which appear in the conventional treatment, with collective operators is a conceptual difference that emerges from the present approach.

scholarly journals Nonequilibrium density operator approach to domain wall resistivity

2011 ◽  
Vol 286 ◽  
pp. 012017 ◽  
Author(s):  
Jun-ichiro Kishine ◽  
A S Ovchinnikov ◽  
I V Proskurin
Keyword(s):  
Domain Wall ◽  
Density Operator ◽  
Operator Approach ◽  
Wall Resistivity
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