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Contrary to our immediate and vivid sensation of past, present, and future as continually shifting non-relational modalities, time remains as tenseless and relational as space in all of the established theories of fundamental physics. Here…

广义相对论与量子宇宙学 · 物理学 2015-06-25 Joy Christian

Canonical variables for the Poisson algebra of quantum moments are introduced here, expressing semiclassical quantum mechanics as a canonical dynamical system that extends the classical phase space. New realizations for up to fourth order…

量子物理 · 物理学 2019-05-01 Bekir Baytas , Martin Bojowald , Sean Crowe

This text describes a generalization of the analytic signal (Gabor, 1946) approach for the definition of instantaneous amplitude and phase to the case of multivariate signals. It was originally written as an appendix for another paper,…

数据分析、统计与概率 · 物理学 2008-07-23 Carsten Allefeld

We describe geometrically contact Lagrangian systems under impulsive forces and constraints, as well as instantaneous nonholonomic constraints which are not uniform along the configuration space. In both situations, the vector field…

数学物理 · 物理学 2023-01-24 Leonardo J. Colombo , Manuel de León , Asier López-Gordón

This work is devoted to a systematic exposition of the dynamics of a rigid body, considered as a system with kinematic constraints. Having accepted the variational problem in accordance with this, we no longer need any additional postulates…

经典物理 · 物理学 2023-09-06 Alexei A. Deriglazov

The inadequacy of Li\'{e}nard-Wiechert potentials is demonstrated as one of the examples related to the inconsistency of the conventional classical electrodynamics. The insufficiency of the Faraday-Maxwell concept to describe the whole…

高能物理 - 理论 · 物理学 2009-10-28 Andrew E. Chubykalo , Roman Smirnov-Rueda

In this paper of "The Epistemology of Contemporary Physics" series we investigate the epistemological significance and sensibility (and hence interpretability and interpretation) of classical mechanics in its Newtonian and non-Newtonian…

科普物理 · 物理学 2024-11-14 Taha Sochi

These notions in the title are of fundamental importance in any branch of physics. However, there have been great difficulties in finding physically acceptable definitions of them in general relativity since Einstein's time. I shall explain…

广义相对论与量子宇宙学 · 物理学 2016-05-18 Mu-Tao Wang

We employ a recently formulated dequantization procedure to obtain an exact expression for the kinetic energy which is applicable to all kinetic-energy functionals. We express the kinetic energy of an N-electron system as the sum of an…

化学物理 · 物理学 2007-08-01 I. P. Hamilton , Ricardo A. Mosna , L. Delle Site

Globally-constrained classical fields provide a unexplored framework for modeling quantum phenomena, including apparent particle-like behavior. By allowing controllable constraints on unknown past fields, these models are retrocausal but…

量子物理 · 物理学 2018-07-04 Ken Wharton

This novel approach to the foundation of the physical theory begins with Hermann von Helmholtz fundamental analysis of basic measurements. We explain the mathematical formalism from the operationalization of basic observables. According to…

物理学史与哲学 · 物理学 2015-12-04 Bruno Hartmann

This work presents an elegant formalism to model the evolution of the full two rigid body problem. The equations of motion, given in a Cartesian coordinate system, are expressed in terms of spherical harmonics and Wigner D-matrices. The…

地球与行星天体物理 · 物理学 2017-02-08 Gwenaël Boué

In this paper we shall define and study the angular momentum-energy space for the classical problem of plane-motions of a particle situated in a potential field of a central force. We shall present the angular momentum-energy space for some…

数学物理 · 物理学 2007-05-23 Dan Comanescu

We reformulate Classical Mechanics as a timeless relativistic theory. Readers are introduced to a new class of reference systems, the binate frames, where physical events are identified with four position-coordinates -- no clocks are used.…

综合物理 · 物理学 2016-09-05 Samuel H. Talbert

A formulation of classical electrodynamics on an energy-momentum background of constant, non-zero curvature is given. The procedure consists of taking the formulation of standard electrodynamics in the energy-momentum representation, and…

综合物理 · 物理学 2020-01-01 Boris Ivetić

Minimizing the Action integral of a Lagrangian provides the Euler-Lagrange equation of motion in the elegant machinery of Lagrangian Mechanics. However two relations define the divergence of current and energy-momentum, and provide an…

经典物理 · 物理学 2020-04-22 Clinton L Lewis

The effective Lagrangian of a point charge is derived by eliminating the electromagnetic field within the framework of the classical closed time path formalism. The short distance singularity of the electromagnetic field is regulated by an…

高能物理 - 理论 · 物理学 2015-06-15 Janos Polonyi

Novel gauge functions are introduced to non-relativistic classical mechanics and used to define forces. The obtained results show that the gauge functions directly affect the energy function and that they allow converting an undriven…

数学物理 · 物理学 2020-09-10 Z. E. Musielak , L. C. Vestal , B. D. Tran , T. B. Watson

Interatomic potentials approximate the potential energy of atoms as a function of their coordinates. Their main application is the effective simulation of many-atom systems. Here, we review empirical interatomic potentials designed to…

材料科学 · 物理学 2022-11-11 Martin H. Muser , Sergey V. Sukhomlinov , Lars Pastewka

The rich and diverse dynamics of particle-based systems ultimately originates from the coupling of their degrees of freedom via internal interactions. To arrive at a tractable approximation of such many-body problems, coarse-graining is…

软凝聚态物质 · 物理学 2022-03-31 Matthias Schmidt