A quintessential introduction to dark energy | Zendy

Paul J. Steinhardt | Zendy

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A quintessential introduction to dark energy

Author(s) -

Paul J. Steinhardt

Publication year - 2003

Publication title -

philosophical transactions of the royal society a mathematical physical and engineering sciences

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.074

H-Index - 169

eISSN - 1471-2962

pISSN - 1364-503X

DOI - 10.1098/rsta.2003.1290

Subject(s) - quintessence , dark energy , physics , cosmological constant , de sitter universe , lambda cdm model , metric expansion of space , vacuum energy , astrophysics , universe , phantom energy , theoretical physics , big rip , cosmic cancer database , cosmology

Most of the energy in the Universe consists of some form of dark energy that is gravitationally self-repulsive and that is causing the expansion of the Universe to accelerate. The possible candidates are a vacuum energy density (or, equivalently, a cosmological constant) and quintessence, a time-evolving, spatially inhomogeneous component with negative pressure. In this review, we focus on quintessence and ideas on how it might solve the cosmic coincidence problem, how it might be distinguished observationally from a cosmological constant, and how it may affect the overall cosmic history of the Universe.

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