Results 31 to 40 of about 1,530,241 (273)
From Fractional Quantum Mechanics to Quantum Cosmology: An Overture [PDF]
Mathematics, 2020 Fractional calculus is a couple of centuries old, but its development has been less embraced and it was only within the last century that a program of applications for physics started. Regarding quantum physics, it has been only in the previous decade or
P. Moniz, S. Jalalzadeh
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Non-oscillating power spectra in loop quantum cosmology [PDF]
Classical and quantum gravity, 2020 We characterize in an analytical way the general conditions that a choice of vacuum state for the cosmological perturbations must satisfy to lead to a power spectrum with no scale-dependent oscillations over time.
B. Navascués +2 more
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Universe, 2023 Quantum cosmology aims to develop a quantum theory of the universe, attempting to answer open questions of physical cosmology, mainly related to the early epochs of the universe. Such a theory aims to unite relativity theory and quantum theory. Here, the
Shreya Banerjee
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Cosmic Tangle: Loop Quantum Cosmology and CMB Anomalies
Universe, 2021 Loop quantum cosmology is a conflicted field in which exuberant claims of observability coexist with serious objections against the conceptual and physical viability of its current formulations.
Martin Bojowald
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Frontiers in Astronomy and Space Sciences, 2021 In this review, we investigate the question of backreaction in different approaches to cosmological perturbation theory, and with a special focus on quantum theoretical aspects. By backreaction we refer here to the effects of matter field or cosmological
S. Schander, S. Schander, T. Thiemann
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Quantum Mechanics in the Light of Quantum Cosmology [PDF]
, 2018 We sketch a quantum mechanical framework for the universe as a whole. Within that framework we propose a program for describing the ultimate origin in quantum cosmology of the quasiclassical domain of familiar experience and for characterizing the ...
M. Gell-Mann, J. Hartle
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The Quantum Cosmological Constant [PDF]
Symmetry, 2019 We present an extension of general relativity in which the cosmological constant becomes dynamical and turns out to be conjugate to the Chern–Simons invariant of the Ashtekar connection on a spatial slicing. The latter has been proposed Soo and Smolin as a time variable for quantum gravity: the Chern–Simons time.
Alexander, S, Magueijo, J, Smolin, L
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Emergent de Sitter Epoch of the Quantum Cosmos from Loop Quantum Cosmology. [PDF]
Physical Review Letters, 2018 The quantum nature of the big bang is reexamined in the framework of loop quantum cosmology. The strict application of a regularization procedure to the Hamiltonian, originally developed for the Hamiltonian in loop quantum gravity, leads to a qualitative
Mehdi Assanioussi +3 more
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Universe, 2021 The goal of this contribution is to present the properties of a class of quantum bouncing models in which the quantum bounce originates from the Dirac canonical quantization of a midi-superspace model composed of a homogeneous and isotropic background ...
Nelson Pinto-Neto
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Hamiltonian diagonalization in hybrid quantum cosmology [PDF]
Classical and quantum gravity, 2019 We explore the possibility of selecting a natural vacuum state for scalar and tensor gauge-invariant cosmological perturbations in the context of hybrid quantum cosmology, by identifying those variables for the description of the perturbations that ...
Beatriz Elizaga Navascués +2 more
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