Results 51 to 60 of about 116,432 (201)
Transport properties in the Horndeski holographic two-currents model
European Physical Journal C: Particles and Fields, 2023 The transport features of the holographic two-currents model are investigated in the Horndeski gravity framework. This system displays metallic or insulating characteristics depending on whether the Horndeski coupling parameter $$\gamma $$ γ is negative ...
Dan Zhang +4 more
doaj +1 more source
Universe, 2022 The hybrid and the dressed metric formalisms for the study of primordial perturbations in Loop Quantum Cosmology lead to dynamical equations for the modes of these perturbations that are of a generalized harmonic-oscillator type, with a mass that depends
Simon Iteanu, Guillermo A. Mena Marugán
doaj +1 more source
Observational Exclusion of a Consistent Quantum Cosmology Scenario
, 2015 It is often argued that inflation erases all the information about what took place before it started. Quantum gravity, relevant in the Planck era, seems therefore mostly impossible to probe with cosmological observations.
Barrau, Aurelien +3 more
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Work Versus Force: Simultaneous Processes for Describing Interactions
Advanced Physics Research, EarlyView.ABSTRACT Achieving a unified description of interactions remains an open challenge in theoretical physics, which currently describes four fundamental forces. This situation may be viewed differently when interactions are formulated in terms of processes (work as actio) rather than forces (force as actio), not only at the macroscopic level but also at ...
Grit Kalies +2 more
wiley +1 more source
Quantum cosmological backreactions. II. Purely homogeneous quantum cosmology
Physical Review D, 2022 This is the second paper in a series of four in which we use space adiabatic methods in order to incorporate backreactions among the homogeneous and between the homogeneous and inhomogeneous degrees of freedom in quantum cosmological perturbation theory. The purpose of the present paper is twofold. On the one hand, it illustrates the formalism of space
J. Neuser, S. Schander, T. Thiemann
openaire +3 more sources
Classical and Quantum Solutions and the Problem of Time in $R^2$ Cosmology [PDF]
, 1995 We have studied various classical solutions in $R^2$ cosmology. Especially we have obtained general classical solutions in pure $R^2$\ cosmology. Even in the quantum theory, we can solve the Wheeler-DeWitt equation in pure $R^2$\ cosmology exactly ...
Banks T +22 more
core +3 more sources
Kant on Rational Reference: Theology as transcendental philosophy
European Journal of Philosophy, EarlyView.Abstract The Critical Kant famously held that our cognition requires intuition, or essentially singular representation. Kant is also often understood as taking a dismissive attitude toward his rationalist predecessors' accounts of how we cognize singulars or individuals.
Maya Krishnan
wiley +1 more source
Quantum cosmology and tachyons [PDF]
Fortschritte der Physik, 2008 AbstractWe discuss the relevance of the classical and quantum rolling tachyons inflation in the frame of the standard, p‐adic and adelic minisuperspace quantum cosmology. The field theory of tachyon matter proposed by Sen in a zero‐dimensional version suggested by Kar leads to a model of a particle moving in a constant external field with quadratic ...
Dimitrijevic, D. D. +2 more
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Quantum out-of-equilibrium cosmology
European Physical Journal C: Particles and Fields, 2019 In this work, our prime focus is to study the one to one correspondence between the conduction phenomena in electrical wires with impurity and the scattering events responsible for particle production during stochastic inflation and reheating implemented
Sayantan Choudhury +3 more
doaj +1 more source
Causal Loop Quantum Gravity and Cosmological Solutions
, 2004 We shall present here the causal interpretation of canonical quantum gravity in terms of new variables. Then we shall apply it to the minisuperspace of cosmology.
A Shojai +16 more
core +1 more source