Gravitation and Experiment
Poincaré Seminar 2006
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Chapter
High-Order Post-Newtonian Contributions to Gravitational Self-force Effects in Black Hole Spacetimes
The explicit analytical computation of first-order metric perturbations in black hole spacetimes is described in the case of a perturbing mass moving on an equatorial circular orbit. The perturbation equations...
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Chapter
The Effective-One-Body Approach to the General Relativistic Two Body Problem
The two-body problem in General Relativity has been the subject of many analytical investigations. After reviewing some of the methods used to tackle this problem (and, more generally, the N-body problem), we foc...
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Chapter
The General Relativistic Two Body Problem and the Effective One Body Formalism
A new analytical approach to the motion and radiation of (comparable mass) binary systems has been introduced in 1999 under the name of Effective One Body (EOB) formalism. We review the basic elements of this ...
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Chapter
Time and Relativity
We discuss the interplay between the apparent fundamental irreversibility of Time (“Second Law”) and Einstein’s views about Space, Time and Matter. A particular attention is given to Boltzmann’s 1897 entropic ...
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Article
Sugawara-Type Constraints in Hyperbolic Coset Models
In the conjectured correspondence between supergravity and geodesic models on infinite-dimensional hyperbolic coset spaces, and E 10/K(E 10) in particular, the cons...
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Chapter
The Effective One-Body Description of the Two-Body Problem
The effective one-body (EOB) formalism is an analytical approach which aims at providing an accurate description of the motion and radiation of coalescing binary black holes with arbitrary mass ratio. We revie...
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Chapter
The Equivalence Principle and the Constants of Nature
We briefly review the various contexts within which one might address the issue of “why” the dimensionless constants of Nature have the particular values that they are observed to have. Both the general histor...
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Article
The Equivalence Principle and the Constants of Nature
We briefly review the various contexts within which one might address the issue of “why” the dimensionless constants of Nature have the particular values that they are observed to have. Both the general histor...
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Chapter
Binary Systems as Test-Beds of Gravity Theories
The discovery of binary pulsars in 1974 [1] opened up a new testing ground for relativistic gravity. Before this discovery, the only available testing ground for relativistic gravity was the solar system. As E...
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Book
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Chapter
General Relativity today
After recalling the coceptual foundations and the vasic sturcture of general relativity, we review some of its main modern developments (apart from cosmology): ( i ) the post-Newtonian limit and weak-field tes...
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Article
Curvature corrections and Kac–Moody compatibility conditions
We study possible restrictions on the structure of curvature corrections to gravitational theories in the context of their corresponding Kac–Moody algebras, following the initial work on E ...
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Book
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Chapter
Einstein 1905–1955: His Approach to Physics
We review Einstein’s epistemological conceptions, and indicate their philosophical roots. The particular importance of the ideas of Hume, Kant, Mach, and Poincaré is highlighted. The specific characteristics o...
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Chapter
Billiard Dynamics of Einstein-Matter Systems Near a Spacelike Singularity
It is shown in detail that the dynamics in the vicinity of a spacelike singularity of the D-dimentional Einstein-dilaton-p-form system can be described, at each spatial point, as a billiard motion in a region of ...
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Chapter and Conference Paper
String Cosmology and Chaos
We briefly review two aspects of string cosmology: (1) the presence of chaos in the generic cosmological solutions of the tree-level low-energy effective actions coming out of string theory, and (2) the remarkabl...
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Article
String Cosmology and Chaos
We briefly review two aspects of string cosmology: (1) the presence of chaos in the generic cosmological solutions of the tree-level low-energy effective actions coming out of string theory, and (2) the remark...
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Article
String theory, cosmology and varying constants
In string theory the coupling `constants' appearing in the low-energy effective Lagrangian are determined by the vacuum expectation values of some (a priori) mass less scalar fields (dilaton, moduli). This nat...
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Chapter
String Theory, Cosmology and Varying Constants
In string theory the coupling ‘constants’ appearing in the low-energy effective Lagrangian are determined by the vacuum expectation values of some (a priori) massless scalar fields (dilaton, moduli). This natu...
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Article
Essay: Chaos in Superstring Cosmology
We show that the general solution of the Einstein-Dilaton-antisymmetric-tensors field equations of all superstring theories exhibits a chaotic oscillatory behaviour of the Belinskii-Khalatnikov-Lifshitz type n...
