Statistical Mechanics of Noninteracting Particles
Oct, 19865 pages
Published in:
- Phys.Lett.B 186 (1987) 370
- Published: 1987
Report number:
- MIT-CTP-1409
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Abstract: (Elsevier)
A Langevin equation is used to study the time evolution of the density matrix of a two-state system in which one of the states interacts with a thermal bath, but the other has no interactions. The interaction eigenstates are not energy eigenstates, so that the interaction eigenstates oscillate with time. The rate of approach to equilibrium of the non-interacting state is suppressed relative to that of the interacting state. The results are important for the analysis of singlet neutrinos in the early universe.- NEUTRINO: OSCILLATION
- STATISTICAL MECHANICS: DENSITY MATRIX
- LANGEVIN EQUATION
- ASTROPHYSICS
- THERMODYNAMICS
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