Possible Connection between the Location of the Cutoff in the Cosmic Microwave Background Spectrum and the Equation of State of Dark Energy

Kari Enqvist and Martin S. Sloth

Phys. Rev. Lett. 93, 221302 – Published 23 November 2004

Abstract

We investigate a possible connection between the suppression of the power at low multipoles in the cosmic microwave background (CMB) spectrum and the late time acceleration. We show that, assuming a cosmic IR/UV duality between the UV cutoff and a global infrared cutoff given by the size of the future event horizon, the equation of state of the dark energy can be related to the apparent cutoff in the CMB spectrum. The present limits on the equation of state of dark energy are shown to imply an IR cutoff in the CMB multipole interval of $9 > l > 8.5$ .

Received 9 June 2004

DOI:https://doi.org/10.1103/PhysRevLett.93.221302

Authors & Affiliations

Kari Enqvist^* and Martin S. Sloth^†

Department of Physical Sciences, University of Helsinki, 00014 Helsinki, Finland and Helsinki Institute of Physics, University of Helsinki, P.O. Box 64, 00014 Helsinki, Finland

^*Electronic address: kari.enqvist@helsinki.fi
^†Present address: Department of Physics, University of California, Davis, CA 95616, USA. Electronic address: sloth@physics.ucdavis.edu

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Issue

Vol. 93, Iss. 22 — 26 November 2004

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