Physics – Optics
Scientific paper
Jan 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987phrva..35..411s&link_type=abstract
Physical Review A (General Physics), Volume 35, Issue 1, January 1, 1987, pp.411-416
Physics
Optics
3
Other Topics In Statistical Physics, Thermodynamics, And Nonlinear Dynamical Systems, Other Topics In General Relativity And Gravitation, Other Topics In Electromagnetism, Electron And Ion Optics
Scientific paper
The equilibrium state of a system is determined by requiring the entropy to be maximum under an infinitesimal variation. Properly speaking, the variation of the thermodynamic variables of a system under a long-range force should be accompanied by a variation of the long-range force fields so as to maintain the field equations (self-consistent-field variation). These problems are, however, often treated by restricting the variations to a small region and ignoring the corresponding field variations (fixed-external-field variation). The equivalence between the two formulations is found to be nontrivial and sometimes only of a limited nature.
Suen W.-M.
Young Kenneth K.
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