Do Cosmological Perturbations Have Zero Mean

  title={Do Cosmological Perturbations Have Zero Mean},
  author={Cristian Armendariz-Picon},
  journal={Journal of Cosmology and Astroparticle Physics},
  • C. Armendariz-Picon
  • Published 13 December 2010
  • Physics
  • Journal of Cosmology and Astroparticle Physics
A central assumption in our analysis of cosmic structure is that cosmological perturbations have a constant ensemble mean, which can be set to zero by appropriate choice of the background. This property is one of the consequences of statistical homogeneity, the invariance of correlation functions under spatial translations. In this article we explore whether cosmological perturbations indeed have zero mean, and thus test one aspect of statistical homogeneity. We carry out a classical test of… Expand
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