3.4k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- National Institute for Subatomic PhysicsNL871 papers
- Centre National de la Recherche ScientifiqueFR771 papers
- University of AmsterdamNL560 papers
- Istituto Nazionale di Fisica Nucleare, Sezione di BolognaIT517 papers
- Institut National de Physique Nucléaire et de Physique des ParticulesFR514 papers
- University of BirminghamGB502 papers
- European Organization for Nuclear ResearchCH493 papers
- Lawrence Berkeley National LaboratoryUS484 papers
- The University of Texas at AustinUS482 papers
- Indian Institute of Technology BombayIN479 papers
- The Ohio State UniversityUS473 papers
- Commissariat à l'Énergie Atomique et aux Énergies AlternativesFR467 papers
11 papers · 2 filters
The Scalar Field Kernel in Cosmological Spaces
Jurjen F. Koksma, Tomislav Prokopec, Gerasimos I. Rigopoulos
We construct the quantum mechanical evolution operator in the Functional Schrodinger picture - the kernel - for a scalar field in spatially homogeneous FLRW spacetimes when the fie…
A New Class of Group Field Theories for 1st Order Discrete Quantum Gravity
Daniele Oriti, Tamer Tlas
Group Field Theories, a generalization of matrix models for 2d gravity, represent a 2nd quantization of both loop quantum gravity and simplicial quantum gravity. In this paper, we…
Group field theory as the microscopic description of the quantum spacetime fluid: a new perspective on the continuum in quantum gravity
Daniele Oriti
We introduce the group field theory (GFT) formalism for non-perturbative quantum gravity, and present it as a potential unifying framework for several other quantum gravity approac…
Entropy calculation for a toy black hole
Hanno Sahlmann
In this note we carry out the counting of states for a black hole in loop quantum gravity, however assuming an equidistant area spectrum. We find that this toy-model is exactly sol…
Putting a cap on causality violations in CDT
J. Ambjorn, R. Loll, W. Westra +1
The formalism of causal dynamical triangulations (CDT) provides us with a non-perturbatively defined model of quantum gravity, where the sum over histories includes only causal spa…
Toward explaining black hole entropy quantization in loop quantum gravity
Hanno Sahlmann
In a remarkable numerical analysis of the spectrum of states for a spherically symmetric black hole in loop quantum gravity, Corichi, Diaz-Polo and Fernandez-Borja found that the e…
A graviton propagator for inflation
Tomas Janssen, Tomislav Prokopec
We construct the scalar and graviton propagator in quasi de Sitter space up to first order in the slow roll parameter . After a rescaling, the propagators are…
Stochastic Inflationary Scalar Electrodynamics
T. Prokopec, N. C. Tsamis, R. P. Woodard
We stochastically formulate the theory of scalar quantum electrodynamics on a de Sitter background. This reproduces the leading infrared logarithms at each loop order. It also allo…
Strong field effects on binary systems in Einstein-aether theory
Brendan Z. Foster
"Einstein-aether" theory is a generally covariant theory of gravity containing a dynamical preferred frame. This article continues an examination of effects on the motion of binary…
Vacuum properties of nonsymmetric gravity in de Sitter space
Tomas Janssen, Tomislav Prokopec
We consider quantum effects of a massive antisymmetric tensor field on the dynamics of de Sitter space-time. Our starting point is the most general, stable, linearized Lagrangian a…
Loop quantum cosmology of k=1 FRW models
Abhay Ashtekar, Tomasz Pawlowski, Parampreet Singh +1
The closed, k=1, FRW model coupled to a massless scalar field is investigated in the framework of loop quantum cosmology using analytical and numerical methods. As in the k=0 case,…