Results 61 to 70 of about 451 (178)
Restrictions on curved cosmologies in modified gravity from metric considerations
Physics Letters B, 2015 This study uses very simple symmetry and consistency considerations to put constraints on possible Friedmann equations for modified gravity models in curved spaces. As an example, it is applied to loop quantum cosmology.
Linda Linsefors, Aurelien Barrau
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Anthropology of Consciousness, Volume 37, Issue 1, Spring 2026.ABSTRACT This article questions the moral and causal certainties attributed to the clinical assumptions of the breath of chaos. Instead of seeing chaos as an exceptional intruder that causes problems in health, I suggest that chaos underlines the changing conditions of health and it's an intrinsic part of breathing and everyday life. I discuss the five‐
Yuxin Peng
wiley +1 more source
Non‐standard loop quantum cosmology
Annalen der Physik, 2010 AbstractWe present results concerning the nature of the cosmological big bounce (BB) transition within the loop geometry underlying loop quantum cosmology (LQC). Our canonical quantization method is an alternative to the standard LQC. An evolution parameter we use has clear interpretation both at classical and quantum levels.
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Variational methods in loop quantum cosmology [PDF]
Europhysics Letters (EPL), 2006 An action functional for the loop quantum cosmology difference equation is presented. It is shown that by guessing the general form of the solution and optimizing the action functional with respect to the parameters in the guessed solution one can obtain approximate solutions which are reasonably good.
Shojai, F., Shojai, A.
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Topological‐defect‐featured order evolution of liquid crystals
Responsive Materials, Volume 4, Issue 1, February 2026.This review provides a comprehensive introduction to the recent advances in the topological‐defect‐featured order evolution of liquid crystal (LCs), including the stimulus‐driven dynamics of defects in nematic LCs, topological defect morphological transformation during phase transitions, advanced strategies for regulating and applications of ...
Jin‐Bing Wu +4 more
wiley +1 more source
Loop quantum cosmology scalar field models [PDF]
International Journal of Geometric Methods in Modern Physics, 2018 In this work, we use the Loop Quantum Cosmology (LQC) modified scalar–tensor reconstruction techniques in order to investigate how bouncing and inflationary cosmologies can be realized. With regard to the inflationary cosmologies, we shall be interested in realizing the intermediate inflation and the Type IV singular inflation, while with regard to ...
K. Kleidis, V. K. Oikonomou
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Starobinsky potential and power suppression in hybrid loop quantum cosmology
Physics Letters BWe study the effect on the primordial tensor power spectrum of varying the number of e-folds during slow-roll inflation in Loop Quantum Cosmology with a Starobinsky potential. Using the hybrid quantization approach, we derive the effective mass governing
Marceau Henry +2 more
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New Hamiltonian constraint operator for loop quantum gravity
Physics Letters B, 2015 A new symmetric Hamiltonian constraint operator is proposed for loop quantum gravity, which is well defined in the Hilbert space of diffeomorphism invariant states up to non-planar vertices with valence higher than three. It inherits the advantage of the
Jinsong Yang, Yongge Ma
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Advanced Intelligent Systems, Volume 8, Issue 1, January 2026.This perspective article considers what computations optical computing can and should enable. Focusing upon free‐space optical computing, it argues that a codesign approach whereby materials, devices, architectures, and algorithms are simultaneously optimized is needed.
Prasad P. Iyer +6 more
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Qualitative study in loop quantum cosmology [PDF]
Classical and Quantum Gravity, 2017 This work contains a detailed qualitative analysis, in General Relativity and in Loop Quantum Cosmology, of the dynamics in the associated phase space of a scalar field minimally coupled with gravity, whose potential mimics the dynamics of a perfect fluid with a linear Equation of State (EoS).
Aresté Saló, Llibert +2 more
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