The adhesion model as a field theory for cosmological clustering
Abstract
The adhesion model has been proposed in the past as an improvement of the Zel'dovich approximation, providing a good description of the formation of the cosmic web. We recast the model as a field theory for cosmological large scale structure, adding a stochastic force to account for power generated from very short, highly nonlinear scales that is uncorrelated with the initial power spectrum. The dynamics of this Stochastic Adhesion Model (SAM) is reminiscent of the well known KardarParisiZhang equation with the difference that the viscosity and the noise spectrum are time dependent. Choosing the viscosity proportional to the growth factor D restricts the form of noise spectrum through a 1loop renormalization argument. For this choice, the SAM field theory is renormalizable to one loop. We comment on the suitability of this model for describing the nonlinear regime of the CDM power spectrum and its utility as a relatively simple approach to cosmological clustering.
 Authors:
 Institut für Theoretische Physik, Universität Heidelberg, Philosophenweg 12, Heidelberg, 69120 Germany (Germany)
 Publication Date:
 OSTI Identifier:
 22382035
 Resource Type:
 Journal Article
 Resource Relation:
 Journal Name: Journal of Cosmology and Astroparticle Physics; Journal Volume: 2015; Journal Issue: 01; Other Information: Country of input: International Atomic Energy Agency (IAEA)
 Country of Publication:
 United States
 Language:
 English
 Subject:
 79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; APPROXIMATIONS; EQUATIONS; FIELD THEORIES; NOISE; NONLINEAR PROBLEMS; RENORMALIZATION; SPECTRA; STOCHASTIC PROCESSES; TIME DEPENDENCE; VISCOSITY
Citation Formats
Rigopoulos, Gerasimos, Email: rigopoulos@thphys.uniheidelberg.de. The adhesion model as a field theory for cosmological clustering. United States: N. p., 2015.
Web. doi:10.1088/14757516/2015/01/014.
Rigopoulos, Gerasimos, Email: rigopoulos@thphys.uniheidelberg.de. The adhesion model as a field theory for cosmological clustering. United States. doi:10.1088/14757516/2015/01/014.
Rigopoulos, Gerasimos, Email: rigopoulos@thphys.uniheidelberg.de. 2015.
"The adhesion model as a field theory for cosmological clustering". United States.
doi:10.1088/14757516/2015/01/014.
@article{osti_22382035,
title = {The adhesion model as a field theory for cosmological clustering},
author = {Rigopoulos, Gerasimos, Email: rigopoulos@thphys.uniheidelberg.de},
abstractNote = {The adhesion model has been proposed in the past as an improvement of the Zel'dovich approximation, providing a good description of the formation of the cosmic web. We recast the model as a field theory for cosmological large scale structure, adding a stochastic force to account for power generated from very short, highly nonlinear scales that is uncorrelated with the initial power spectrum. The dynamics of this Stochastic Adhesion Model (SAM) is reminiscent of the well known KardarParisiZhang equation with the difference that the viscosity and the noise spectrum are time dependent. Choosing the viscosity proportional to the growth factor D restricts the form of noise spectrum through a 1loop renormalization argument. For this choice, the SAM field theory is renormalizable to one loop. We comment on the suitability of this model for describing the nonlinear regime of the CDM power spectrum and its utility as a relatively simple approach to cosmological clustering.},
doi = {10.1088/14757516/2015/01/014},
journal = {Journal of Cosmology and Astroparticle Physics},
number = 01,
volume = 2015,
place = {United States},
year = 2015,
month = 1
}

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