Quantum Origin of Noise and Fluctuations in Cosmology

Details Quantum Origin of Noise and Fluctuations in Cosmology Quantum Origin of Noise and Fluctuations in Cosmology

1995-12-29

arxiv.org/abs/gr-qc/9512049v1

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

Plain Tex, 32 pages. This is a reprint of a 1992 conference talk published in 1993. It is related to two later papers on simil

Scientific paper

We address two basic issues in the theory of galaxy formation from fluctuations of quantum fields: 1) the nature and origin of noise and fluctuations and 2) the conditions for using a classical stochastic equation for their description. On the first issue, we derive the influence functional for a $\lambda \phi^4 $ field in a zero-temperature bath in de Sitter universe and obtain the correlator for the colored noises of vacuum fluctuations. This exemplifies a new mechanism we propose for colored noise generation which can act as seeds for galaxy formation with non-Gaussian distributions. For the second issue, we present a (functional) master equation for the inflaton field in de Sitter universe. By examining the form of the noise kernel we study the decoherence of the long-wavelength sector and the conditions for it to behave classically.

Affiliated with

Also associated with

No associations

Rating

Quantum Origin of Noise and Fluctuations in Cosmology does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Quantum Origin of Noise and Fluctuations in Cosmology, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Quantum Origin of Noise and Fluctuations in Cosmology will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-282949