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Abstract / Description of output
A generalization of the random fluid hydrodynamic fluctuation theory due to Landau and Lifshitz is applied to describe cosmological fluctuations in systems with radiation and scalar fields. The viscous pressures, parametrized in terms of the bulk and shear viscosity coefficients, and the respective random fluctuations in the radiation fluid are combined with the stochastic and dissipative scalar evolution equation. This results in a complete set of equations describing the perturbations in both scalar and radiation fluids. These derived equations are then studied, as an example, in the context of warm inflation. Similar treatments can be done for other cosmological early universe scenarios involving thermal or statistical fluctuations.
Original language  English 

Article number  004 
Number of pages  32 
Journal  Journal of Cosmology and Astroparticle Physics (JCAP) 
Volume  2014 
Issue number  05 
DOIs  
Publication status  Published  May 2014 
Keywords / Materials (for Nontextual outputs)
 cosmological perturbation theory
 inflation
 CMBR theory
 EXPECTATION VALUE FORMALISM
 WARM INFLATION MODEL
 DENSITY PERTURBATIONS
 FINITETEMPERATURE
 EARLY UNIVERSE
 TRANSPORTCOEFFICIENTS
 BOLTZMANNEQUATION
 BROWNIAN MOTION
 QUANTUM
 HYDRODYNAMICS
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Dive into the research topics of 'Cosmological fluctuations of a random field and radiation fluid'. Together they form a unique fingerprint.Projects
 1 Finished

Particle Theory at the Tait Institute
Ball, R., Berera, A., Boyle, P., Del Debbio, L., FigueroaO'Farrill, J., Gardi, E., Horsley, R., Kennedy, A., Kenway, R., Pendleton, B. & Simon Soler, J.
1/10/11 → 30/09/15
Project: Research
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Arjun Berera
 School of Physics and Astronomy  Personal Chair in Theoretical Physics
Person: Academic: Research Active