Results 1  10
of
78
Scaling in quantum gravity
 Nucl. Phys. B
, 1995
"... The 2point function is the natural object in quantum gravity for extracting critical behavior: The exponential fall off of the 2point function with geodesic distance determines the fractal dimension dH of spacetime. The integral of the 2point function determines the entropy exponent γ, i.e. the ..."
Abstract

Cited by 42 (10 self)
 Add to MetaCart
The 2point function is the natural object in quantum gravity for extracting critical behavior: The exponential fall off of the 2point function with geodesic distance determines the fractal dimension dH of spacetime. The integral of the 2point function determines the entropy exponent γ, i.e. the fractal structure related to baby universes, while the short distance behavior of the 2point function connects γ and dH by a quantum gravity version of Fisher’s scaling relation. We verify this behavior in the case of 2d gravity by explicit calculation. 1 1
Modified Gravity and Cosmology
, 2012
"... In this review we present a thoroughly comprehensive survey of recent work on modified theories of gravity and their cosmological consequences. Amongst other things, we cover General Relativity, ScalarTensor, EinsteinAether, and Bimetric theories, as well as TeVeS, f(R), general higherorder theo ..."
Abstract

Cited by 28 (0 self)
 Add to MetaCart
In this review we present a thoroughly comprehensive survey of recent work on modified theories of gravity and their cosmological consequences. Amongst other things, we cover General Relativity, ScalarTensor, EinsteinAether, and Bimetric theories, as well as TeVeS, f(R), general higherorder theories, HořavaLifschitz gravity, Galileons, Ghost Condensates, and models of extra dimensions including KaluzaKlein, RandallSundrum, DGP, and higher codimension braneworlds. We also review attempts to construct a Parameterised PostFriedmannian formalism, that can be used to constrain deviations from General Relativity in cosmology, and that is suitable for comparison with data on the largest scales. These subjects have been intensively studied over the past decade, largely motivated by rapid progress in the field of observational cosmology that now allows, for the first time, precision tests of fundamental physics on the scale of the observable Universe. The purpose of this review is to provide a reference tool for researchers and students in cosmology and gravitational physics, as well as a selfcontained, comprehensive and uptodate introduction to the subject as a whole.
Quantum field theory, gravity and cosmology in a fractal universe
 JHEP 1003 (2010) 120 [arXiv:1001.0571
"... ar ..."
(Show Context)
Shape Dynamics and Mach’s Principles: Gravity from Conformal Geometrodynamics
, 2011
"... ..."
(Show Context)