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THE COVARIANT PHASE SPACE OF ASYMPTOTICALLY FLAT GRAVITATIONAL FIELDS
Publisher Summary This chapter discusses the covariant phase space of asymptotically flat gravitational fields and covariant constructions for field theories. In the case of general relativity,Expand
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Testing general relativity with present and future astrophysical observations
One century after its formulation, Einstein's general relativity (GR) has made remarkable predictions and turned out to be compatible with all experimental tests. Most of these tests probe the theoryExpand
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  • Open Access
DISCRETENESS WITHOUT SYMMETRY BREAKING: A THEOREM
This paper concerns random sprinklings of points into Minkowski spacetime (Poisson processes). It proves that there exists no equivariant measurable map from sprinklings to spacetime directions (evenExpand
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Statistical Lorentzian geometry and the closeness of Lorentzian manifolds
I introduce a family of closeness functions between causal Lorentzian geometries of finite volume and arbitrary underlying topology. When points are randomly scattered in a Lorentzian manifold, withExpand
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  • Open Access
A New Measurement of Kaonic Hydrogen X-rays
The KN system at threshold is a sensitive testing ground for low energy QCD, especially for the explicit chiral symmetry breaking. Therefore, we have measured the K-series x rays of kaonic hydrogenExpand
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Introduction of bosonic fields into causal set theory
We describe a framework for constructing Lagrangians for fields propagating on the background of a locally finite partially ordered set where the partial order corresponds to causal relations, aExpand
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  • Open Access
Silicon Drift Detectors and CUBE Preamplifiers for High-Resolution X-ray Spectroscopy
In this work we present the results of the experimental characterization of Silicon Drift Detectors (SDDs) readout by CUBE preamplifiers for X-ray spectroscopy measurements. One specific goal of theExpand
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The origin of Lorentzian geometry
Abstract We investigate how a Lorentzian manifold can be reconstructed from a more fundamental structure, in the context of a proposal for a quantum theory of gravity. We first show that someExpand
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On energy in 5-dimensional gravity and the mass of the Kaluza-Klein monopole
Abstract We discuss the concept of energy in higher-dimensional gravity, with special attention given to the problem of the choice of a background. Three different approaches to the calculation ofExpand
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Statistical geometry of random weave states
I describe the first steps in the construction of semiclassical states for non-perturbative canonical quantum gravity using ideas from classical, Riemannian statistical geometry and results fromExpand
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  • Open Access