Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- University of California, BerkeleyUS1.3k papers
- Goddard Space Flight CenterUS1.3k papers
- California Institute of TechnologyUS1.3k papers
- The Ohio State UniversityUS1.2k papers
- Centre National de la Recherche ScientifiqueFR1.1k papers
- Massachusetts Institute of TechnologyUS1.1k papers
- University of Maryland, College ParkUS1k papers
- Center for Astrophysics Harvard & SmithsonianUS975 papers
- Lawrence Berkeley National LaboratoryUS898 papers
- University of ChicagoUS889 papers
- University of WashingtonUS868 papers
- Yale UniversityUS848 papers
34 papers · 1 filter
Extended Loops: A New Arena for Nonperturbative Quantum Gravity
C. Di Bartolo, R. Gambini, J. Griego +1
We propose a new representation for gauge theories and quantum gravity. It can be viewed as a generalization of the loop representation. We make use of a recently introduced extens…
Any behaviour of the Mitchell Ordering of Normal Measures Is Possible
Jiří Witzany
Let be two normal measures on We say that is in the Mitchell ordering less then if The ordering is wel…
Leptoproduction of Heavy Quarks II -- A Unified QCD Formulation of Charged and Neutral Current Processes from Fixed-target to Collider Energies
M. A. G. Aivazis, John C. Collins, Fredrick I. Olness +1
A unified QCD formulation of leptoproduction of massive quarks in charged current and neutral current processes is described. This involves adopting consistent factorization and re…
Spectral Properties of Blast Wave Models of Gamma-Ray Burst Sources
P. Meszaros, M. J. Rees, H. Papathanassiou
We calculate the spectrum of blast wave models of gamma-ray burst sources, for various assumptions about the magnetic field density and the relativistic particle acceleration effic…
Reality Conditions for Lorentzian and Euclidean Gravity in the Ashtekar Formulation
Guillermo A. Mena Marugan
Using Ashtekar variables, we analyze Lorentzian and Euclidean gravity in vacuum up to a constant conformal transformation. We prove that the reality conditions are invariant under…
A Real Polynomial Formulation of General Relativity in terms of Connections
J. Fernando Barbero
I show in this letter that it is possible to construct a Hamiltonian description for Lorentzian General Relativity in terms of two real connections. The constraints are sim…
Representation Theory of Analytic Holonomy C* Algebras
Abhay Ashtekar, Jerzy Lewandowski
Integral calculus on the space of gauge equivalent connections is developed. Loops, knots, links and graphs feature prominently in this description. The framework is well--suited f…
Aspects of Heavy Quark Production in Polarized Proton-Proton Collisions
M. Karliner, R. W. Robinett
We examine the spin-dependence of b-quark production at large transverse momentum in polarized proton-proton collisions. The leading-order (LO) 2 -> 2 subprocesses, g + g -> Q + Q-…
Decoherence and Dissipation for a Quantum System Coupled to a Local Environment
Michael R. Gallis
Decoherence and dissipation in quantum systems has been studied extensively in the context of Quantum Brownian Motion. Effective decoherence in coarse grained quantum systems has b…
The Physical Phase of Dimensionally Reduced Gauge Theories
L. Karkkainen, P. Lacock, D. E. Miller +2
We investigate the relationship between the high temperature deconfined phase of the SU(2) gauge theory to the phases of the corresponding three dimensional adjoint Higgs model. Fo…
General Relativity as a Theory of Two Connections
J. Fernando Barbero
We show in this paper that it is possible to formulate General Relativity in a phase space coordinatized by two connections. We analyze first the Husain-Kuchař model and fi…
Reality Conditions in Nonperturbative Quantum Cosmology
Guillermo A. Mena Marugan
We carry out the nonperturbative canonical quantization of several types of cosmological models that have already been studied in the geometrodynamic formulation using the complex…
Possible Behaviours of the Reflection Ordering of Stationary Sets
Jiří Witzany
If are stationary subsets of a regular uncountable cardinal , we say that reflects fully in , , if for almost all (except a nonstationary set) $S \cap…
A New Proof of Kunen's Inconsistency
Jindřich Zapletal
Using elementary pcf, we show that there is no transitive,
Gamma-Ray Bursts from Blast Waves Around Galactic Nuetron Stars
Mitchell C. Begelman, P. Meszaros, Martin J. Rees
If gamma-ray bursts originate in our Galaxy, they probably involve violent disturbances in the magnetospheres of neutron stars. Any event of this kind is likely to trigger the sudd…
Instanton contributions to the decay widths
I. I. Balitsky, M. Beneke, V. M. Braun
Contrary to some previous claims, we find a sizable instanton contribution to the finite energy sum rule used to extract the value of the strong coupling from the measured deca…
Proper Time Formalism and Gauge Invariance in Open String Interactions
B. Sathiapalan
The issue of gauge invariances in the sigma model formalism is discussed at the free and interacting level. The problem of deriving gauge invariant interacting equations can be add…
The physical hamiltonian in nonperturbative quantum gravity
Carlo Rovelli, Lee Smolin
A quantum hamiltonian which evolves the gravitational field according to time as measured by constant surfaces of a scalar field is defined through a regularization procedure based…
Bianchi Cosmologies: New Variables and a Hidden Supersymmetry
Octavio Obregon, Jorge Pullin, Michael P. Ryan
We find a supersymmetrization of the Bianchi IX cosmology in terms of Ashtekar's new variables. This provides a framework for connecting the recent results of Graham and those of R…
The Generalized Peierls Bracket
Donald Marolf
We first extend the Peierls algebra of gauge invariant functions from the space of classical solutions to the space of histories used in path integration and…
Poisson Bracket on the Space of Histories
Donald Marolf
We extend the Poisson bracket from a Lie bracket of phase space functions to a Lie bracket of functions on the space of canonical histories and investigate the resulting algebras.…
Models of Particle Detection in Regions of Spacetime
Donald Marolf
We investigate two models of measuring devices designed to detect a non-relativistic free particle in a given region of spacetime. These models predict different probabilities for…
Spacelike Wilson Loops at Finite Temperature
L. Karkkainen, P. Lacock, D. E. Miller +2
In the high temperature phase of Yang-Mills theories, large spatial Wilson loops show area law behaviour with a string tension that grows with increasing temperature. Within the fr…
Inhomogeneous Inflation: Numerical Evolution
Hannu Kurki-Suonio, Pablo Laguna, Richard A. Matzner
We describe our 3-dimensional numerical relativity code for the evolution of inhomogeneous cosmologies. During the evolution the constraint equations are monitored but not solved.…