Results 41 to 50 of about 2,700,632 (80)

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, Bojowald M, Bojowald M, Bojowald M, Bojowald M, Bojowald M, Bojowald M, Bojowald M, Bojowald M, Bojowald M, Bojowald M, Bojowald M Vandersloot K, Date G, Dirac P A M, Fernando J, Gaul M, Golam Mortuza Hossain, Immirzi G, Kodama H, Misner C W, Perez A Rovelli C, Rovelli C, Rovelli C, Smolin L, Thiemann T, Thiemann T, Thiemann T   +26 more
core   +1 more source

Quantum Inflation of Classical Shapes [PDF]

, 2014
I consider a quantum system that possesses key features of quantum shape dynamics and show that the evolution of wave-packets will become increasingly classical at late times and tend to evolve more and more like an expanding classical system.
Koslowski, Tim A.
core  

Group field theory condensate cosmology: An appetizer

, 2019
This contribution is an appetizer to the relatively young and fast evolving approach to quantum cosmology based on group field theory condensate states. We summarize the main assumptions and pillars of this approach which has revealed new perspectives on
Pithis, A. G. A., Sakellariadou, M.
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

A Zero-Parameter Extension of General Relativity with Varying Cosmological Constant

, 2019
We provide a new extension of general relativity (GR) which has the remarkable property of being more constrained than GR plus a cosmological constant, having one less free parameter.
Alexander, Stephon, Cortês, Marina, Liddle, Andrew R., Magueijo, João, Sims, Robert, Smolin, Lee   +5 more
core   +1 more source

Underlying Field Structure of Matter [PDF]

arXiv, 1999
Intrinsic unfication of quantum theory and general relativity based on the underlying quantum dynamics of fundamental field has been proposed.
arxiv  

Specialized computer algebra system for application in general relativity [PDF]

arXiv, 2007
A brief characteristic of the specialized computer algebra system GRG_EC intended for symbolic computations in the field of general relativity is given.
arxiv  

Coherent states for FLRW space-times in loop quantum gravity

, 2011
We construct a class of coherent spin-network states that capture proprieties of curved space-times of the Friedmann-Lama\^itre-Robertson-Walker type on which they are peaked.
Abhay Ashtekar, Abhay Ashtekar, Antonino Marcianò, Carlo Rovelli, Claudio Perini, Elena Magliaro, Robert M. Wald, Thomas Thiemann   +7 more
core   +2 more sources

On some toy quantum cosmology [PDF]

arXiv, 2010
Some connections of the quantum potential to gravitation are discussed.
arxiv  

Supersymmetric quantum solution for FRW cosmological model with matter [PDF]

Rev.Mex.Fis. 48 (2002) 112-117, 2001
Using technique of supersymmetric quantum mechanics we present new cosmological quantum solution, in the regime for FRW cosmological model using a barotropic perfect fluid as matter field.
arxiv