2008/07/31 by Jan Hamann, Steen Hannestad, Martin S. Sloth +3
Physics and Astronomy · #Amplitude #Cosmology #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Galaxies: Formation, Evolution, Phenomena #Inflation (cosmology) #Large Synoptic Survey Telescope #Observable #Primordial fluctuations #Scale (ratio) #Spectral density #Telescope #astro-ph #gr-qc #hep-th
paper · pdf · doi:10.1088/1475-7516/2008/09/015
20 pages, 3 figures, uses iopart.cls; v2: 21 pages, added references, to appear in JCAP
arxiv created 2008/09/12 · openalex publication_date 2008/09/19 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We revisit the issue of ripples in the primordial power spectra caused by trans-Planckian physics, and the potential for their detection by future cosmological probes. We find that for reasonably large values of the first slow-roll parameter ( ), a positive detection of trans-Planckian ripples can be made even if the amplitude is as low as 10 −4 . Data from the Large Synoptic Survey Telescope (LSST) and the proposed future 21 cm survey with the Fast Fourier Transform Telescope (FFTT) will be particularly useful in this regard. If the scale of inflation is close to its present upper bound, a scale of new physics as high as ∼0.2 M P could lead to observable signatures.