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相关论文: Studies on Some Aspects of the Fundamental Theory …

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The theoretical foundations of quantum mechanics and de Broglie-Bohm mechanics are analyzed and it is shown that both theories employ a formal approach to microphysics. By using a realistic approach it can be established that the internal…

量子物理 · 物理学 2007-05-23 W. A. Hofer

We consider general relativistic homogeneous gravitational collapses for dust and radiation. We show that replacing the density profile with an effective density justified by some quantum gravity framework leads to the avoidance of the…

广义相对论与量子宇宙学 · 物理学 2013-08-07 Cosimo Bambi , Daniele Malafarina , Leonardo Modesto

We analyze some relevant semiclassical and quantum features of the implementation of Polymer Quantum Mechanics to the phenomenology of the flat isotropic Universe. We firstly investigate a parallelism between the semiclassical polymer…

广义相对论与量子宇宙学 · 物理学 2020-04-17 Gabriele Barca , Paolo Di Antonio , Giovanni Montani , Alberto Patti

A physical theory of the world is presented under the unifying principle that all of nature is laid out before us and experienced through the passage of time. The one-dimensional progression in time is opened out into a multi-dimensional…

综合物理 · 物理学 2016-07-01 David J. Jackson

In the transition from nuclear matter to finite nuclei, complex finite-size effects which characterise open systems arise, in relation with either the nuclear surface or the bulk. In addition, the non-equilibrium character of the process,…

核理论 · 物理学 2022-03-28 P. Napolitani , H. Dinh Viet , M. Colonna

We study homogeneous cosmological models featuring shift-symmetric scalar fields (or, superfluids) in relative motion. In the presence of anisotropy this universe generally features rotation, in the sense that the principal axes of…

宇宙学与河外天体物理 · 物理学 2025-11-24 Jose Beltrán Jiménez , Federico Piazza , Javier Vecino

Physical systems characterized by a shallow two-body bound or virtual state are governed at large distances by a continuous-scale invariance, which is broken to a discrete one when three or more particles come into play. This symmetry…

核理论 · 物理学 2022-10-05 A. Kievsky , L. Girlanda , M. Gattobigio , M. Viviani

The theory of physical dimensions and units in physics is outlined. This includes a discussion of the universal applicability and superiority of quantity equations. The International System of Units (SI) is one example thereof. By analyzing…

广义相对论与量子宇宙学 · 物理学 2019-02-04 Friedrich W. Hehl , Claus Lämmerzahl

An introduction to modern theories for the origin of structure in the Universe is given. After a brief review of the growth of cosmological perturbations in an expanding Universe and a summary of some important observational results, the…

天体物理学 · 物理学 2008-02-03 Robert H. Brandenberger

According to the second law of thermodynamics, the arrow of time points to an ever increasing entropy of the Universe. However, exactly how the entropy evolves with time and what drives the growth remain largely unknown. Here, for the first…

宇宙学与河外天体物理 · 物理学 2012-11-09 Xinghai Zhao , Yuexing Li , Qirong Zhu , Derek Fox

We find five fundamental reasons demanding that any gravitational mass m, and the speed of light c, vary with cosmological time such that mc remains constant. This is required by the universal condition of conservation of momentum in a…

综合物理 · 物理学 2015-06-26 Antonio Alfonso-Faus

We study quantum cosmology with conformal matter comprising a perfect radiation fluid and a number of conformally coupled scalar fields. Focusing initially on the collective coordinates (minisuperspace) associated with homogeneous,…

高能物理 - 理论 · 物理学 2016-07-07 Steffen Gielen , Neil Turok

The expansion of our universe, when followed backward in time, implies that it emerged from a phase of huge density, the big bang. These stages are so extreme that classical general relativity combined with matter theories is not able to…

广义相对论与量子宇宙学 · 物理学 2007-05-23 Martin Bojowald

One of the greatest achievements of twentieth century physics is the discovery of a very close link between the microcosm and the macrocosm. This follows from the two basic principles of quantum mechanics and relativity, the uncertainty…

科普物理 · 物理学 2007-05-23 D. P. Roy

The bulk viscosity of cosmological fluid and the creation of cold dark matter both result in the generation of irreversible entropy (related to dissipative processes) in a homogeneous and isotropic universe. To consider such effects, the…

宇宙学与河外天体物理 · 物理学 2014-12-16 Nobuyoshi Komatsu , Shigeo Kimura

A brief review is given of the present state of an approach to consistency between basic quantum mechanics and a unique macroscopic reality, with no assumption of branching in the state of the universe. The main new idea consists in the…

量子物理 · 物理学 2013-02-08 Roland Omnes

A new conjecture is proposed that there are two sorts of matter called s-matter and v-matter which are symmetric and whose gravitational masses are opposite to each other, although both masses are positive. Therefore, there are two sorts of…

综合物理 · 物理学 2011-03-09 Shi-Hao Chen

Quantum solitons are discovered with the help of generalized quantum hydrodynamics. The solitons have the character of the stable quantum objects in the self consistent electric field. The delivered theory demonstrates the great…

综合物理 · 物理学 2010-12-24 Boris V. Alexeev

General relativity predicts a singularity in the beginning of the universe being called big bang. Recent developments in loop quantum cosmology avoid the singularity and the big bang is replaced by a big bounce. A classical theory of…

综合物理 · 物理学 2011-02-08 Walter Petry

The Cartesian material space approach to Maxwell's equations reveals the analytical solution of the continuous radial density for the extended elementary charge. Radial charges and their Coulomb fields carry equal passive and active…

综合物理 · 物理学 2017-09-12 I. E. Bulyzhenkov