Quantum statistics in a Robertson-Walker universe

Details Quantum statistics in a Robertson-Walker universe Quantum statistics in a Robertson-Walker universe

Sep 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979jpha...12.1507b&link_type=abstract

Journal of Physics A - Mathematical and General, vol. 12, Sept. 1979, p. 1507-1510.

Astronomy and Astrophysics

Astrophysics

2

Astrophysics, Cosmology, Quantum Statistics, Universe, Harmonic Oscillators, Minkowski Space, Nonequilibrium Conditions, Particle Flux Density, Scalars, Stefan-Boltzmann Law

Scientific paper

The application of finite-temperature quantum field theory to a nonequilibrium situation where a harmonic oscillator interacts with a heat bath made of scalar, massless zero-test particles in a Robertson-Walker background, is discussed. The expected value of the energy density (vacuum terms discarded) at some initial time t equal to zero is examined and then compared with the Stefan-Boltzmann law. Using the same argument for an abritrary t, it is determined that the energy density is equal to that of blackbody radiation in accordance with standard red-shift arguments.

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