Results 1 to 10 of about 53,051 (238)
Beyond General Relativity: Models for Quantum Gravity, Loop Quantum Cosmology and Black Holes [PDF]
Universe, 2020 In the past two decades, we have witnessed extraordinary progress in precision measurements in cosmology [...]
Nick E. Mavromatos
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Primordial perturbations in kinetically dominated regimes of general relativity and hybrid quantum cosmology [PDF]
Physical Review D, 2022 Scalar fields with an energy density dominated by its kinetic part may have played a relevant role in the very early stages of the Universe. Compared to the standard inflationary paradigm, they may lead to modifications in observable quantities, e.g. the
Beatriz Elizaga Navascués +2 more
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Quantum cosmology of pure connection general relativity [PDF]
Classical and quantum gravity, 2023 We study homogeneous cosmological models in formulations of general relativity with cosmological constant based on a (complexified) connection rather than a spacetime metric, in particular in a first order theory obtained by integrating out the self-dual
Steffen Gielen, Elliot Nash
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Analytical investigation of pre-inflationary effects in the primordial power spectrum: from General Relativity to hybrid Loop Quantum Cosmology [PDF]
Journal of Cosmology and Astroparticle Physics, 2021 This work is an analytical study of the main differences between classical inflationary effects of a fast-roll regime and imprints of hybrid Loop Quantum Cosmology (LQC) on the primordial power spectrum.
Beatriz Elizaga Navascués +3 more
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A scientometric study of general relativity and quantum cosmology from 2000 to 2012 [PDF]
Scientometrics, 2015 2015 is the centennial of Einstein General Relativity. On this occasion, we examine the General Relativity and Quantum Cosmology (GRQC) field of research by analysing 38,291 papers uploaded on the electronic archives arXiv.org from 2000 to 2012.
Stéphane Fay +3 more
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Hybrid Loop Quantum Cosmology: An Overview [PDF]
Frontiers in Astronomy and Space Sciences, 2021 Loop Quantum Gravity is a nonperturbative and background independent program for the quantization of General Relativity. Its underlying formalism has been applied successfully to the study of cosmological spacetimes, both to test the principles and ...
Beatriz Elizaga Navascués +1 more
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Minisuperspace Quantum Cosmology in Metric and Affine Theories of Gravity [PDF]
Universe, 2022 Minisuperspace Quantum Cosmology is an approach by which it is possible to infer initial conditions for dynamical systems which can suitably represent observable and non-observable universes. Here we discuss theories of gravity which, from various points
Salvatore Capozziello, Francesco Bajardi
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This preprint proposes a temporal‑lattice framework for quantum gravity and unification. The central hypothesis is that spacetime at the most fundamental scale is a causal lattice with discrete time steps and spatial sites, and that all physical degrees of freedom—geometry, gauge fields, and matter—are realized as temporal‑phase patterns on
Prabhakar, Siddharth
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================================================================================ FORMAL SPACETIME GEOMETRY AND ONTOLOGY (FSGO): A UNIFIED FRAMEWORK CONNECTING QUANTUM STRUCTURE, FIELD DYNAMICS, AND SPACETIME MORPHOLOGY ================================================================================ OVERVIEW This paper proposes Formal Spacetime ...
Takagi Takayuki
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Abstract Quantum Vibrational Relativity (QVR) proposes that spacetime itself is a vibrational field whose layered modes generate all known physical phenomena.In this framework, dark matter and dark energy emerge as complementary binding and expansive modes of the same scalar field, while observable reality arises from systems tuning to specific ...
Rajendran, Meena
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