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Three-dimensional loop quantum gravity: physical scalar product and spin-foam models
In this paper, we address the problem of the dynamics in three-dimensional loop quantum gravity with zero cosmological constant. We construct a rigorous definition of Rovelli's generalized projectionExpand
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Black hole entropy from the SU(2)-invariant formulation of type I isolated horizons
A detailed analysis of the spherically symmetric isolated horizon system is performed in terms of the connection formulation of general relativity. The system is shown to admit a manifestly SU(2)Expand
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Spin foam model for Lorentzian general relativity
We present a spin foam formulation of Lorentzian quantum General Relativity. The theory is based on a simple generalization of an Euclidean model defined in terms of a field theory over a group. ItsExpand
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A local first law for black hole thermodynamics
We first show that stationary black holes satisfy an extremely simple local form of the first law \delta E=\kappa(l) \delta A/(8 \pi) where the thermodynamical energy E=A/(8\pi l) and (local) surfaceExpand
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Black hole entropy and SU(2) Chern-Simons theory.
Black holes (BH's) in equilibrium can be defined locally in terms of the so-called isolated horizon boundary condition given on a null surface representing the event horizon. We show that thisExpand
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Attenuation of high‐frequency seismic waves beneath the central Andean Plateau
Observed patterns of high-frequency seismic wave attenuation suggest that near 22°S, the upper mantle structure beneath the central Andean plateau changes along strike to the south. ContrastingExpand
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Physical effects of the Immirzi parameter in loop quantum gravity
The Immirzi parameter is a constant appearing in the general-relativity action used as a starting point for the loop quantization of gravity. The parameter is commonly believed not to appear in theExpand
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Finiteness of a spinfoam model for Euclidean quantum general relativity
Abstract We prove that a certain spinfoam model for Euclidean quantum general relativity, recently defined, is finite: all its all Feynman diagrams converge. The model is a variant of theExpand
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Seismicity and tectonics in Jujuy Province, northwestern Argentina
The Portable Array for Numerical Digital Analysis (PANDA) network, a digitally recorded seismic array, operated for nine months in Jujuy province of northwestern Argentina. The network was deployedExpand
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3+1 spinfoam model of quantum gravity with spacelike and timelike components
We present a spin foam formulation of Lorentzian quantum general relativity. The theory is based on a simple generalization of a Euclidean model defined in terms of a field theory over a group. TheExpand
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