A stochastic cosmological model

Details A stochastic cosmological model A stochastic cosmological model

Feb 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990phla..144...65b&link_type=abstract

Physics Letters A, Volume 144, Issue 2, p. 65-70.

Physics

1

Scientific paper

We analyse a stochastic cosmological model formed by adding a noise term to the equation of state of a perfect fluid Friedmann- Robertson-Walker spacetime. The system of equations can be transformed to that of a simple harmonic oscillator with a multiplicative noise term; this model is unstable in the sense that fluctuations about the mean grow. By a suitable rescaling of the noise term, we obtain a system with an additive noise term which turns out to be stable.

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