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19922026
most citedSciPy 1.0--Fundamental Algorithms for Scientific Computing in Python

40.2k citations

Showing 2011 · gr-qcShow all

10 papers · 2 filters

gr-qc2011★ 71 cited

Lorentzian spinfoam propagator

Eugenio Bianchi, You Ding

The two-point correlation function is calculated in the Lorentzian EPRL spinfoam model, and shown to match with the one in Regge calculus in a proper limit: large boundary spins, a…

gr-qc2011★ 49 cited

Resonance and absorption spectra of the Schwarzschild black hole for massive scalar perturbations: a complex angular momentum analysis

Yves Décanini, Antoine Folacci, Bernard Raffaelli

We reexamine some aspects of scattering by a Schwarzschild black hole in the framework of complex angular momentum techniques. More precisely, we consider, for massive scalar pertu…

gr-qc2011★ 40 cited

Many-nodes/many-links spinfoam: the homogeneous and isotropic case

Francesca Vidotto

I compute the Lorentzian EPRL/FK/KKL spinfoam vertex amplitude for regular graphs, with an arbitrary number of links and nodes, and coherent states peaked on a homogeneous and isot…

gr-qc2011★ 135 cited

Black hole entropy and isolated horizons thermodynamics

Amit Ghosh, Alejandro Perez

We present a statistical mechanical calculation of the thermodynamical properties of (non rotating) isolated horizons. The introduction of Planck scale allows for the definition of…

gr-qc2011★ 7 cited

Complex Ashtekar variables, the Kodama state and spinfoam gravity

Wolfgang Wieland

Starting from a Hamiltonian description of four dimensional general relativity in presence of a cosmological constant we perform the program of canonical quantisation. This is done…

gr-qc2011★ 14 cited

Pre-Big-Bang Cosmology and Circles in the Cosmic Microwave Background

William Nelson, Edward Wilson-Ewing

We examine the possibility that circles in the cosmic microwave background could be formed by the interaction of a gravitational wave pulse emitted in some pre-big-bang phase of th…

gr-qc2011★ 144 cited

Universality of high-energy absorption cross sections for black holes

Yves Décanini, Gilles Esposito-Farèse, Antoine Folacci

We consider the absorption problem for a massless scalar field propagating in static and spherically symmetric black holes of arbitrary dimension endowed with a photon sphere. For…

gr-qc2011★ 68 cited

Discreteness of the volume of space from Bohr-Sommerfeld quantization

Eugenio Bianchi, Hal M. Haggard

A major challenge for any theory of quantum gravity is to quantize general relativity while retaining some part of its geometrical character. We present new evidence for the idea t…

gr-qc2011★ 83 cited

Zakopane lectures on loop gravity

Carlo Rovelli

These are introductory lectures on loop quantum gravity. The theory is presented in self-contained form, without emphasis on its derivation from classical general relativity. Dynam…

gr-qc2011★ 7 cited

2+1 gravity with positive cosmological constant in LQG: a proposal for the physical state

Daniele Pranzetti

In this paper, I investigate the possible quantization, in the context of LQG, of three dimensional gravity in the case of positive cosmological constant Λ and try to make contact…