Theories of Dark Energy with Screening Mechanisms

Abstract

Despite the overwhelming evidence for the existence of dark energy and dark matter, their underlying fundamental physics remains unknown. This review article explores the tantalizing possibility that the dark sector includes new light degrees of freedom that mediate long-range forces on cosmological scales. To ensure consistency with laboratory and solar system tests of gravity, some screening mechanism is necessary to "hide" these degrees of freedom locally. I will focus on two broad classes of screening theories, chameleons and symmetrons, which rely respectively on the scalar field acquiring a large mass or weak coupling in the presence of large ambient matter density.

arXiv comment8 pages. Plenary talk at the 22nd Rencontres de Blois on Particle Physics and Cosmology, Blois, France, July 15-20, 2010. To appear in the conference proceedings

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Cited by in corpus (49)

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• Tests of Gravity with Future Space-Based Experiments
• Galileon Radiation from Binary Systems
• The Warped Dark Sector
• Cosmological constraints on dark energy in light of gravitational wave bounds
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• Cosmological Constraints on sub-horizon scales modified gravity theories with MGCLASS II
• Pulsar Constraints on Screened Modified Gravity
• Constraints on Chameleon f(R)-Gravity from Galaxy Rotation Curves of the SPARC Sample
• Dark matter haloes in modified gravity and dark energy: interaction rate, small-, and large-scale alignment
• Large fluctuations and Primordial Black Holes
• Black Hole Ringdown as a Probe for Dark Energy
• Spherical collapse and halo mass function in the symmetron model
• Scalar Fields Near Compact Objects: Resummation versus UV Completion
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