Results 31 to 40 of about 75,052 (218)
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 +1 more
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Tomography in loop quantum cosmology [PDF]
The European Physical Journal Plus, 2021 We analyze the tomographic representation for the Friedmann–Robertson–Walker (FRW) model within the Loop Quantum Cosmology framework. We focus on the Wigner quasi-probability distributions associated with Gaussian and Schrödinger cat states, and then, by
J. Berra-Montiel, Alberto Molgado
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Dynamics of k-essence in loop quantum cosmology * [PDF]
Chinese Physics C, High Energy Physics & Nuclear Physics, 2021 In this paper, we study the dynamics of k-essence in loop quantum cosmology (LQC). The study indicates that the loop quantum gravity (LQG) effect plays a key role only in the early epoch of the universe and is diluted in the later stages.
Jia Shi, Jian-Pin Wu
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Onset of inflation in loop quantum cosmology [PDF]
, 2007 Using a Liouville measure, similar to the one proposed recently by Gibbons and Turok, we investigate the probability that single-field inflation with a polynomial potential can last long enough to solve the shortcomings of the standard hot big bang model,
Cristiano Germani +2 more
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Loop quantum cosmology: Recent progress [PDF]
Pramana, 2004 Aspects of the full theory of loop quantum gravity can be studied in a simpler context by reducing to symmetric models like cosmological ones. This leads to several applications where loop effects play a significant role when one is sensitive to the quantum regime.
Martin Bojowald
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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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Towards a reduced phase space quantization in loop quantum cosmology with an inflationary potential [PDF]
Physical Review D, 2020 We explore a reduced phase space quantization of loop quantum cosmology (LQC) with Gaussian and Brown-Kuchař dust, and massless Klein-Gordon scalar reference fields for a spatially flat FLRW model with a Starobinsky inflationary potential.
K. Giesel, Bao-Fei Li, Parampreet Singh
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Singularities in Loop Quantum Cosmology [PDF]
Physical Review Letters, 2008 5 pages, 3 figures. v2: Comments and references added.
Kevin Vandersloot +4 more
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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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Observational consequences of Bianchi I spacetimes in loop quantum cosmology [PDF]
Physical Review D, 2020 Anisotropies generically dominate the earliest stages of expansion of a homogeneous universe. They are particularly relevant in bouncing models, since shears grow in the contracting phase of the cosmos, making the isotropic situation unstable. This paper
I. Agulló, J. Olmedo, V. Sreenath
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