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Warm inflation with backreaction: a stochastic approach

Mauricio Bellini

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I study a stochastic approach for warm inflation considering backreaction of the metric with the fluctuations of the matter field. This formalism takes into account the local inhomogeneities of the spacetime in a globally flat Friedmann-Robertson-Walker metric. The stochastic equations for the fluctuations of the matter field and metric are obtained. Finally, the dynamics for the amplitude of these fluctuations in a power-law expansion for the universe are examined.


PACS

98.80.Cq Particle-theory and field-theory models of the early Universe (including cosmic pancakes, cosmic strings, chaotic phenomena, inflationary universe, etc.)

05.40.-a Fluctuation phenomena, random processes, noise, and Brownian motion

98.80.Es Observational cosmology (including Hubble constant, distance scale, cosmological constant, early Universe, etc)

02.50.Ey Stochastic processes

MSC

85A40 Cosmology (For relativistic cosmology, see 83F05)

60Hxx Stochastic analysis (See also 58J65)

82C31 Stochastic methods (Fokker-Planck, Langevin, etc.) (See also 60H10)

Subjects

Computational physics

Gravitation and cosmology

Statistical physics and nonlinear systems

Astrophysics and astroparticles

Dates

Issue 1 (7 January 2000)

Received 15 July 1999



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