580 citations
- Centre de Physique ThéoriqueFR51 papers
- Aix-Marseille UniversitéFR49 papers
- Centre National de la Recherche ScientifiqueFR20 papers
- Institut de Neurobiologie de la MéditerranéeFR5 papers
- Center for Pastor TheologiansUS3 papers
- Physique des interactions ioniques et moléculairesFR3 papers
- Bielefeld UniversityDE2 papers
- CEA Paris-SaclayFR2 papers
- Commissariat à l'Énergie Atomique et aux Énergies AlternativesFR2 papers
- École Normale Supérieure de LyonFR2 papers
- Institut de Microbiologie de la MéditerranéeFR2 papers
- Laboratoire de Physique de l'ENS de LyonFR2 papers
6 papers · 1 filter
A note on DSR
Carlo Rovelli
I study the physical meaning of Deformed, or Doubly, Special Relativity (DSR). I argue that DSR could be physically relevant in a certain large-distance limit. I consider a concret…
LQG vertex with finite Immirzi parameter
Jonathan Engle, Etera Livine, Roberto Pereira +1
We extend the definition of the "flipped" loop-quantum-gravity vertex to the case of a finite Immirzi parameter. We cover the Euclidean as well as the Lorentzian case. We show that…
Coherent states, constraint classes, and area operators in the new spin-foam models
Jonathan Engle, Roberto Pereira
Recently, two new spin-foam models have appeared in the literature, both motivated by a desire to modify the Barrett-Crane model in such a way that the imposition of certain second…
Extended matter coupled to BF theory
Winston J. Fairbairn, Alejandro Perez
Recently, a topological field theory of membrane-matter coupled to BF theory in arbitrary spacetime dimensions was proposed [1]. In this paper, we discuss various aspects of the fo…
Comment on "Are the spectra of geometrical operators in Loop Quantum Gravity really discrete?" by B. Dittrich and T. Thiemann
Carlo Rovelli
I argue that the prediction of physical discreteness at the Planck scale in loop gravity is a reasonable conclusion that derives from a sensible ensemble of hypotheses, in spite of…
Schroedinger's cat and the clock: Lessons for quantum gravity
Robert Oeckl
I review basic principles of the quantum mechanical measurement process in view of their implications for a quantum theory of general relativity. It turns out that a clock as an ex…