A stochastic cosmological model
| Autor: | A.B. Burd, Peter Coles |
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| Rok vydání: | 1990 |
| Předmět: | |
| Zdroj: | Physics Letters A. 144:65-70 |
| ISSN: | 0375-9601 |
| DOI: | 10.1016/0375-9601(90)90825-9 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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