Results 111 to 120 of about 37,871 (243)
Consistent probabilities in loop quantum cosmology [PDF]
, 2013 A fundamental issue for any quantum cosmological theory is to specify how probabilities can be assigned to various quantum events or sequences of events such as the occurrence of singularities or bounces.
Craig, David A., Singh, Parampreet
core +3 more sources
Visible GeV ALP from TeV Vector‐Like Leptons
Fortschritte der Physik, Volume 73, Issue 3, March 2025.Abstract A model is presented where a GeV axion‐like‐particle (ALP) is predicted in a large portion of the parameter space due to the presence of explicit Peccei–Quinn (PQ) symmetry‐breaking terms in an exotic leptonic sector. The latter provides a solution to the muon g−2$g-2$ anomaly, within the framework of the Linear Seesaw neutrino mechanism.
Arturo de Giorgi +2 more
wiley +1 more source
Properties of Fluctuating States in Loop Quantum Cosmology
Mathematics, 2019 In loop quantum cosmology, the values of volume fluctuations and correlations determine whether the dynamics of an evolving state exhibits a bounce. Of particular interest are states that are supported only on either the positive or the negative part of ...
Martin Bojowald
doaj +1 more source
The Heythrop Journal, Volume 66, Issue 2, Page 157-173, March 2025.Abstract We argue here that bringing insights from evolution and bioengineering to bear on traditional accounts of divine providence helps to illustrate just how complex providence is and how difficult it is to achieve. While other non‐human animals might exhibit greater agency in creation and its evolutionary development than has traditionally been ...
Michael Burdett, Andrew Jackson
wiley +1 more source
Cosmological perturbations in teleparallel Loop Quantum Cosmology [PDF]
Journal of Cosmology and Astroparticle Physics, 2013 version accepted for publication in ...
openaire +4 more sources
Universe, 2018 The understanding of black holes in loop quantum gravity is becoming increasingly accurate. This review focuses on the possible experimental or observational consequences of the underlying spinfoam structure of space-time.
Aurélien Barrau +2 more
doaj +1 more source
The perturbed universe in the deformed algebra approach of Loop Quantum Cosmology
, 2016 Loop quantum cosmology is a tentative approach to model the universe down to the Planck era where quantum gravity settings are needed. The quantization of the universe as a dynamical space-time is inspired by Loop Quantum Gravity ideas. In addition, loop
Grain, J.
core +2 more sources
Switching Internal Times and a New Perspective on the `Wave Function of the Universe’
Universe, 2019 Despite its importance in general relativity, a quantum notion of general covariance has not yet been established in quantum gravity and cosmology, where, given the a priori absence of coordinates, it is necessary to replace classical frames with ...
Philipp A. Höhn
doaj +1 more source
Spin-foam model for gravity coupled to massless scalar field
, 2018 A spin-foam model is derived from the canonical model of Loop Quantum Gravity coupled to a massless scalar field. We generalized to the full theory the scheme first proposed in the context of Loop Quantum Cosmology by Ashtekar, Campiglia and Henderson ...
Kisielowski, Marcin, Lewandowski, Jerzy
core +1 more source
Some conceptual issues in loop quantum cosmology
, 2016 Loop quantum gravity is a mature theory. To proceed to explicit calculations in cosmology, it is necessary to make assumptions and simplifications based on the symmetries of the cosmological setting. Symmetry reduction is especially critical when dealing
Barrau, Aurélien, Bolliet, Boris
core +3 more sources