Radiation damping and the expansion of the universe

Details Radiation damping and the expansion of the universe Radiation damping and the expansion of the universe

Jan 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977phrvd..15..389a&link_type=abstract

Physical Review D - Particles and Fields, 3rd Series, vol. 15, Jan. 15, 1977, p. 389-401. Research supported by the Oesterreichi

Physics

5

Big Bang Cosmology, Electrodynamics, Energy Dissipation, Field Theory (Physics), Harmonic Oscillators, Minkowski Space, Universe, Astronomical Models, Cauchy Problem, Exponential Functions, Relativity, Scalars, Vibration Damping

Scientific paper

An exactly soluble model consisting of a massless scalar field coupled to a harmonic oscillator considered previously in Minkowski space is generalized to spatially open Robertson-Walker cosmologies. It is shown that the dissipative behavior displayed by the system in Minkowski space when the total energy is finite is improved (weakened) by the expansion (contraction) of the universe. Further, we investigate the existence of solutions with purely retarded or purely advanced fields. We show that the system embedded in a universe which originates ('big bang') is similar to the open (external forces acting) system in Minkowski space, thus allowing for retarded but not advanced solutions.

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