PIRSA:18060063

Video URL

https://pirsa.org/18060063

Quantum Loops in de Sitter space and Scale Dependent Galaxy Bias at Small Wave-Vectors

Wise, M. (2018). Quantum Loops in de Sitter space and Scale Dependent Galaxy Bias at Small Wave-Vectors. Perimeter Institute for Theoretical Physics. https://pirsa.org/18060063

Wise, Mark. Quantum Loops in de Sitter space and Scale Dependent Galaxy Bias at Small Wave-Vectors. Perimeter Institute for Theoretical Physics, Jun. 07, 2018, https://pirsa.org/18060063 

          @misc{ scivideos_PIRSA:18060063,
            doi = {10.48660/18060063},
            url = {https://pirsa.org/18060063},
            author = {Wise, Mark},
            keywords = {Particle Physics},
            language = {en},
            title = {Quantum Loops in de Sitter space and Scale Dependent Galaxy Bias at Small Wave-Vectors},
            publisher = {Perimeter Institute for Theoretical Physics},
            year = {2018},
            month = {jun},
            note = {PIRSA:18060063 see, \url{https://scivideos.org/pirsa/18060063}}
          }

Mark Wise California Institute of Technology (Caltech)

Talk numberPIRSA:18060063
DOI10.48660/18060063
Source RepositoryPIRSA
Collection
Talk Type Scientific Series
Subject

Abstract

The power spectrum for fluctuations in the number density of galaxies can be very different in shape from the power spectrum for fluctuations in the mass density at very small wave vectors (i.e., large length scales) if the primordial density fluctuations are non-Gaussian. I review this phenomena. (It  is fairly well known in the more astrophysical part of the cosmology community but less so in the particle physics part of the field.) Then I show that primordial non-Gaussianities that arise from quantum loop diagrams in de-Sitter space can give rise to this phenomena. I also discuss if it is observable given constraints on primordial non-Gaussianity that arise from the Cosmic Microwave Background