Results 11 to 20 of about 20,706 (73)
Heun Functions and Some of Their Applications in Physics
Advances in High Energy Physics, Volume 2018, Issue 1, 2018., 2018 Most of the theoretical physics known today is described by using a small number of differential equations. For linear systems, different forms of the hypergeometric or the confluent hypergeometric equations often suffice to describe the system studied.
M. Hortaçsu, Saber Zarrinkamar
wiley +1 more source
Optimized Reputable Sensing Participants Extraction for Participatory Sensor Networks
Mathematical Problems in Engineering, Volume 2014, Issue 1, 2014., 2014 By collecting data via sensors embedded personal smart devices, sensing participants play a key role in participatory sensor networks. Using information provided by reputable sensing participants ensures the reliability of participatory sensing data.
Weiwei Yuan +3 more
wiley +1 more source
From Physics Model to Results: An Optimizing Framework for Cross‐Architecture Code Generation
Scientific Programming, Volume 21, Issue 1-2, Page 1-16, 2013., 2013 Starting from a high‐level problem description in terms of partial differential equations using abstract tensor notation, the Chemora framework discretizes, optimizes, and generates complete high performance codes for a wide range of compute architectures. Chemora extends the capabilities of Cactus, facilitating the usage of large‐scale CPU/GPU systems
Marek Blazewicz +8 more
wiley +1 more source
Covariant action for bouncing cosmologies in modified Gauss-Bonnet gravity
, 2019 Cyclic universes with bouncing solutions are candidates for solving the big bang initial singularity problem. Here we seek bouncing solutions in a modified Gauss-Bonnet gravity theory, of the type $R+f(G)$, where $R$ is the Ricci scalar, $G$ is the Gauss-
Lemos, José P. S. +2 more
core +1 more source
Relational Motivation for Conformal Operator Ordering in Quantum Cosmology
, 2009 Operator-ordering in quantum cosmology is a major as-yet unsettled ambiguity with not only formal but also physical consequences. We determine the Lagrangian origin of the conformal invariance that underlies the conformal operator-ordering choice in ...
Anderson, Edward
core +1 more source
Hubble operator in isotropic loop quantum cosmology
, 2003 We present a construction of the Hubble operator for the spatially flat isotropic loop quantum cosmology. This operator is a Dirac observable on a subspace of the space of physical solutions.
Bojowald M +26 more
core +1 more source
Quantum Gravity and Inflation [PDF]
, 2004 Using the Ashtekar-Sen variables of loop quantum gravity, a new class of exact solutions to the equations of quantum cosmology is found for gravity coupled to a scalar field, that corresponds to inflating universes.
A. D. Linde +21 more
core +4 more sources
Nonmetricity formulation of general relativity and its scalar-tensor extension
, 2018 Einstein's celebrated theory of gravitation can be presented in three forms: general relativity, teleparallel gravity, and the rarely considered before symmetric teleparallel gravity.
Järv, Laur +3 more
core +1 more source
Loop Quantum Gravity: Four Recent Advances and a Dozen Frequently Asked Questions
, 2007 As per organizers' request, my talk at the 11th Marcel Grossmann Conference consisted of two parts. In the first, I illustrated recent advances in loop quantum gravity through examples.
Ashtekar, Abhay
core +1 more source
Loop quantum gravity corrections to gravitational wave dispersion [PDF]
, 1997 Cosmological tensor perturbations equations are derived for Hamiltonian cosmology based on Ashtekar's formulation of general relativity, including typical quantum gravity effects in the Hamiltonian constraint as they are expected from loop quantum ...
Bojowald, Martin, Hossain, Golam Mortuza
core +3 more sources