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In a recent paper (arXiv:1106.4546), we introduced "dynamical dark matter," a new framework for dark-matter physics, and outlined its underlying theoretical principles and phenomenological possibilities. Unlike most traditional approaches…

高能物理 - 唯象学 · 物理学 2013-05-30 Keith R. Dienes , Brooks Thomas

The dynamics of charged particles moving around a Kerr-Newman black hole surrounded by cloud strings, quintessence and electromagnetic field is integrable due to the presence of a fourth constant of motion like the Carter constant. The…

广义相对论与量子宇宙学 · 物理学 2022-06-22 Wenfu Cao , Wenfang Liu , Xin Wu

The conjecture is considered that every body induces the wave field which imposes oscillations on the gravitational potential of a body. The function for oscillations is chosen to prevent the gravitational collapse of the matter at the…

综合物理 · 物理学 2007-05-23 D. L. Khokhlov

Understanding the fluctuations of observables is one of the main goals in science, be it theoretical or experimental, quantum or classical. We investigate such fluctuations when only a subregion of the full system can be observed, focusing…

强关联电子 · 物理学 2022-02-02 Benoit Estienne , Jean-Marie Stéphan , William Witczak-Krempa

"Cut-out sets" are fractals that can be obtained by removing a sequence of disjoint regions from an initial region of d-dimensional euclidean space. Conversely, a description of some fractals in terms of their void complementary set is…

天体物理学 · 物理学 2008-11-26 Jose Gaite

A holistic view of the cosmological appearance and development of space is obtained by studying space as a spherically closed surface of a 4-sphere in a zero energy balance between motion and gravitation. Such an approach re-establishes…

天体物理学 · 物理学 2009-11-13 Tuomo Suntola

Orbital debris is a nonlinear control problem in a stratified orbital environment, not a static inventory. This paper develops a reduced-order shell-and-size framework that connects collision-rate scaling, fragment-production gain, natural…

天体物理仪器与方法 · 物理学 2026-05-28 Slava G. Turyshev

Fundamental physics today is best defined operationally: it is the program of identifying the microscopic degrees of freedom, symmetries, and dynamical laws that (i) reproduce the Standard Model (SM) of particle physics, General Relativity…

广义相对论与量子宇宙学 · 物理学 2026-05-06 Slava G. Turyshev

The observability of primordial cosmic fluctuations does not require a geometric horizon $H^{-1}$, which is exceeded temporarily by the wavelength of fluctuations. The primordial information can be protected against later thermal washout…

广义相对论与量子宇宙学 · 物理学 2016-05-25 C. Wetterich

We describe a new class of models of quantum space-time based on energetic causal sets and show that under natural conditions space-time emerges from them. These are causal sets whose causal links are labelled by energy and momentum and…

广义相对论与量子宇宙学 · 物理学 2016-02-22 Marina Cortês , Lee Smolin

Vortices play an unique role in heat and momentum transports in astro- and geo-physics, and it is also the origin of the Earth's dynamo. A question existing for a long time is whether the movement of vortices can be predicted or understood…

In this article, we present a galactic gravitational model of three degrees of freedom (3D), in order to study and reveal the character of the orbits of the stars, in a binary stellar system composed of a primary quiet or active galaxy and…

星系天体物理 · 物理学 2017-09-28 Euaggelos E. Zotos

The universe is permeated by a network of filaments, sheets, and knots collectively forming a "cosmic web.'' The discovery of the cosmic web, especially through its signature of absorption of light from distant sources by neutral hydrogen…

天体物理学 · 物理学 2009-11-13 C. -A. Faucher-Giguere , A. Lidz , L. Hernquist

Using a combined analytical and numerical approach, we study the collective spin and orbital excitations in a spin-orbital chain under a crystal field. Irrespective of the crystal field strength, these excitations can be universally…

强关联电子 · 物理学 2015-04-03 Cheng-Chien Chen , Michel van Veenendaal , Thomas P. Devereaux , Krzysztof Wohlfeld

Compelling evidence exists to show that the structure of molecular clouds is fractal in nature. In this paper, the author reiterates this view and, in addition, asserts that not only is cloud geometry fractal, but that they also have a…

天体物理学 · 物理学 2007-05-23 Srabani Datta

In this paper we discuss a cosmological model for a universe with self-regulating features. We set up the theoretical framework for the model and determine the time evolution of the scale-factor $a(t)$. It is shown that such a universe…

广义相对论与量子宇宙学 · 物理学 2024-01-15 Manasse R. Mbonye

Newtonian gravitational potential sourced by a homogeneous circular ring in arbitrary dimensional Euclidean space takes a simple form if the spatial dimension is even. In contrast, if the spatial dimension is odd, it is given in a form that…

广义相对论与量子宇宙学 · 物理学 2020-06-30 Takahisa Igata

Spin-orbit coupling characterizes quantum systems such as atoms, nuclei, hypernuclei, quarkonia, etc., and is essential for understanding their spectroscopic properties. Depending on the system, the effect of spin-orbit coupling on shell…

核理论 · 物理学 2016-06-29 J. -P. Ebran , E. Khan , A. Mutschler , D. Vretenar

In this manuscript, we show that three fundamental building blocks are supporting the Cosmological Principle. The first of them states that there is a special frame in the universe where the spatial geometry is intrinsically homogeneous and…

广义相对论与量子宇宙学 · 物理学 2024-01-05 Leandro G. Gomes

There is an unceasing incoming flux of extraterrestrial materials reaching the Earth's atmosphere. Some of these objects produce luminous columns when they ablate during the hypersonic encounter with air molecules. A few fireballs occur…

地球与行星天体物理 · 物理学 2024-05-29 E. Peña-Asensio , J. M. Trigo-Rodríguez , A. Rimola