Results 91 to 100 of about 2,019 (176)
Quantum Cosmology in the Light of Quantum Mechanics [PDF]
Galaxies, 2019 There is a formal analogy between the evolution of the universe, when this is seen as a trajectory in the minisuperspace, and the worldline followed by a test particle in a curved spacetime. The analogy can be extended to the quantum realm, where the trajectories are transformed into wave packets that give us the probability of finding the universe or ...
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Reports in Advances of Physical SciencesThis paper aims to demonstrate that modern cosmology has overlooked the systematic and holistic aspects of the universe’s evolution. It is based on the notion that the primordial universe comprised a two-component quantum superfluid and a synthesis of ...
Xiaodong Yang +3 more
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Classical and quantum cosmology of Fab Four John theories
Physics Letters B, 2019 We study the John term of Fab Four cosmology in the presence of a scalar potential. We show here how this theory can describe a wide range of cosmological solutions.
Isaac Torres +2 more
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Gravitational Fluctuations as an Alternative to Inflation
Universe, 2019 The ability to reproduce the observed matter power spectrum P ( k ) to high accuracy is often considered as a triumph of inflation. In this work, we explore an alternative explanation for the power spectrum based on nonperturbative quantum field ...
Herbert W. Hamber
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Higher-derivative Quantum Cosmology [PDF]
General Relativity and Gravitation, 2000 The quantum cosmology of a higher-derivative derivative gravity theory arising from the heterotic string effective action is reviewed. A new type of Wheeler-DeWitt equation is obtained when the dilaton is coupled to the quadratic curvature terms. Techniques for solving the Wheeler-DeWitt equation with appropriate boundary conditions shall be described,
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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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Pensamiento. Revista de Investigación e Información Filosófica, 2013 So far we can identify at least three concepts within modern cosmology that bring into debate the question of consciousness in the universe: 1) Fine Tuning; 2) The Anthropic Principle and 3) The Multiverse.
Khalil Chamcham
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On the cosmological constant in quantum cosmology
, 2006 This paper was published originally in "Problems of Gravitational Theory and Particle Theory", VNIIFTRI Proceedings, Moscow, 1972. v. 16(46), pp. 43-48 (in Russian).
Kalinin M.I., Melnikov V.N.
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Quantum Einsteinian cubic cosmology
European Physical Journal C: Particles and FieldsWe study Cosmological Einsteinian Cubic Gravity (CECG) in the context of minisuperspace quantum cosmology. CECG is a modification of Einstein’s gravity by cubic curvature terms that contribute non-trivially to the dynamics of FRW backgrounds, while the ...
Nephtalí Eliceo Martínez Pérez +1 more
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Within the framework of the new formalism of quantum theory - the quantum principle of least action - the initial state of the universe is determined, which is an analogue of the Hartle-Hawking no-boundary wave function. The quantum evolution of the universe is modified by additional conditions in a certain compact region of space-time, which is called
Natalia Gorobey +2 more
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