Results 51 to 60 of about 1,577,801 (299)
No-boundary prescriptions in Lorentzian quantum cosmology [PDF]
Physical Review D, 2019 We analyse the impact of various boundary conditions on the (minisuperspace) Lorentzian gravitational path integral. In particular we assess the implications for the Hartle-Hawking no-boundary wavefunction.
A. Di Tucci, J. Lehners, L. Sberna
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Quantum Gravity Effects in Cosmology
EPJ Web of Conferences, 2018 Within the geometrodynamic approach to quantum cosmology, we studied the quantum gravity effects in cosmology. The Gibbons-Hawking temperature is corrected by quantum gravity due to spacetime fluctuations and the power spectrum as well as any probe field
Gu Je-An, Pyo Kim Sang, Shen Che-Min
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Effective Field Theory of Loop Quantum Cosmology
Universe, 2019 Quantum cosmology is traditionally formulated in a minisuperspace setting, implicitly averaging fields over space to obtain homogeneous models. For universal reasons related to the uncertainty principle, quantum corrections then depend on the size of the
Martin Bojowald
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Pytanie o jedność nauki na przykładzie kosmologii antropicznej
Studia Philosophiae Christianae, 2023 Given the ongoing process of the differentiation of sciences, it is worth posing a question about the possibility of them being integrated. This matter will be explored with reference to anthropic cosmology.
Sławomir Leciejewski
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On the holographic basis of loop quantum cosmology
European Physical Journal C: Particles and Fields, 2018 In this work, we obtain the loop quantum cosmology dynamical equations, plus a positive cosmological constant, from the Bekenstein–Hawking entropy-area relation given by Loop Quantum Black Holes, by the use of the Jacobson formalism (Phys Rev Lett 75 ...
C. A. S. Silva
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The BKL scenario, infrared renormalization, and quantum cosmology [PDF]
Journal of Cosmology and Astroparticle Physics, 2018 A discussion of inhomogeneity is indispensable to understand quantum cosmology, even if one uses the dynamics of homogeneous geometries as a first approximation.
M. Bojowald
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Emergent cosmology from quantum gravity in the Lorentzian Barrett-Crane tensorial group field theory model [PDF]
Journal of Cosmology and Astroparticle Physics, 2021 We study the cosmological sector of the Lorentzian Barrett-Crane (BC) model coupled to a free massless scalar field in its Group Field Theory (GFT) formulation, corresponding to the mean-field hydrodynamics obtained from coherent condensate states.
Alexander F. Jercher +2 more
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Observations in quantum cosmology
Classical and Quantum Gravity, 2023 Abstract In this review, we focus on whether a canonical quantization of general relativity can produce testable predictions for cosmology. In particular, we examine how this approach can be used to model the evolution of primordial perturbations. This program of quantum geometrodynamics, first advocated by John Wheeler and Bryce DeWitt,
Leonardo Chataignier +2 more
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Minimal length effects on quantum cosmology and quantum black hole models [PDF]
Classical and quantum gravity, 2019 A Kantowski–Sachs model with a modified quantization prescription is considered. Such quantization rules, inspired by the so-called generalized uncertainty principle, correspond to a modified commutation relation between minisuperspace variables and ...
P. Bosso, O. Obreg'on
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Correspondence between dark energy quantum cosmology and Maxwell equations
European Physical Journal C: Particles and Fields, 2019 A Friedmann–Robertson–Walker cosmology with dark energy can be modelled using a quintessence field. That system is equivalent to a relativistic particle moving on a two-dimensional conformal spacetime.
Felipe A. Asenjo, Sergio A. Hojman
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