Cosmological Imprint of an Energy Component with General Equation of State

R. R. Caldwell, Rahul Dave, and Paul J. Steinhardt
Phys. Rev. Lett. 80, 1582 – Published 23 February 1998
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Abstract

We examine the possibility that a significant component of the energy density of the Universe has an equation of state different from that of matter, radiation, or cosmological constant ( Λ). An example is a cosmic scalar field evolving in a potential, but our treatment is more general. Including this component alters cosmic evolution in a way that fits current observations well. Unlike Λ, it evolves dynamically and develops fluctuations, leaving a distinctive imprint on the microwave background anisotropy and mass power spectrum.

  • Received 28 July 1997

DOI:https://doi.org/10.1103/PhysRevLett.80.1582

©1998 American Physical Society

Authors & Affiliations

R. R. Caldwell, Rahul Dave, and Paul J. Steinhardt

  • Department of Physics and Astronomy, University of Pennsylvania, Philadelphia, Pennsylvania 19104

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Vol. 80, Iss. 8 — 23 February 1998

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