Non-Local Modification of Gravity and the Cosmological Constant Problem

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dc.creatorArkani-Hamed, Nima
dc.creatorDimopoulos, Savas
dc.creatorDvali, Gia
dc.creatorGabadadze, Gregory
dc.date2002-09-26
dc.date.accessioned2026-07-07T04:14:11Z
dc.date.available2026-07-07T04:14:11Z
dc.descriptionWe propose a phenomenological approach to the cosmological constant problem based on generally covariant non-local and acausal modifications of four-dimensional gravity at enormous distances. The effective Newton constant becomes very small at large length scales, so that sources with immense wavelengths and periods -- such as the vacuum energy-- produce minuscule curvature. Conventional astrophysics, cosmology and standard inflationary scenaria are unaffected, as they involve shorter length scales. A new possibility emerges that inflation may ``self-terminate'' naturally by its own action of stretching wavelengths to enormous sizes. In a simple limit our proposal leads to a modification of Einstein's equation by a single additional term proportional to the average space-time curvature of the Universe. It may also have a qualitative connection with the dS/CFT conjecture.
dc.description22 pages
dc.identifierhttps://arxiv.org/abs/hep-th/0209227
dc.identifierhttp://arxiv.org/abs/hep-th/0209227
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/51532
dc.subjectHigh Energy Physics - Theory
dc.subjectAstrophysics
dc.subjectGeneral Relativity and Quantum Cosmology
dc.subjectHigh Energy Physics - Phenomenology
dc.titleNon-Local Modification of Gravity and the Cosmological Constant Problem
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