Domain Walls As Probes Of Gravity

Abstract

We show that domain walls are probes that enable one to distinguish large-distance modified gravity from general relativity (GR) at short distances. For example, low-tension domain walls are stealth in modified gravity, while they do produce global gravitational effects in GR. We demonstrate this by finding exact solutions for various domain walls in the DGP model. A wall with tension lower than the fundamental Planck scale does not inflate and has no gravitational effects on a 4D observer, since its 4D tension is completely screened by gravity itself. We argue that this feature remains valid in a generic class of models of infrared modified gravity. As a byproduct, we obtain exact solutions for super-massive codimension-2 branes.

25 pages, 4 figures

References in corpus (3)

• Predictive Power of Strong Coupling in Theories with Large Distance Modified Gravity
• Schwarzschild solution in brane induced gravity
• Infrared Modification of Gravity

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• Induced gravity on intersecting brane-worlds Part I: Maximally symmetric solutions
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• Bubbles in the Self-Accelerating Universe
• Aspects of Infrared Modifications of Gravity
• Consistent Lorentz Violation in Flat and Curved Space
• Mass Screening in Modified Gravity
• A Model for Cosmic Self-Acceleration
• Strong Coupling Holography
• Trace Anomaly Inflation in Brane Induced Gravity