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As mathematical model for the evolutionary equations of species the masterequation is choiced. Two formulations will be demonstrated to include the changes of parameters into the masterequation - that is, on the one hand, the formation of a…

种群与进化 · 定量生物学 2007-05-23 Ingrid Hartmann

Using 2 more time variables as the quantum hidden variables, we derive the equation of Dirac field under the principle of classical physics, then we extend our method into the quantum fields with arbitrary spin number. The spin of particle…

量子物理 · 物理学 2007-05-23 Xiaodong Chen

We propose a history state formalism for a Dirac particle. By introducing a reference quantum clock system it is first shown that Dirac's equation can be derived by enforcing a timeless Wheeler-DeWitt-like equation for a global state. The…

量子物理 · 物理学 2019-02-19 N. L. Diaz , R. Rossignoli

The original intent of the Koopman-von Neumann formalism was to put classical and quantum mechanics on the same footing by introducing an operator formalism into classical mechanics. Here we pursue their path the opposite way and examine…

量子物理 · 物理学 2023-03-08 Igor Mezic

Quantum mechanics rests on the assumption that time is a classical variable. As such, classical time is assumed to be measurable with infinite accuracy. However, all real clocks are subject to quantum fluctuations, which leads to the…

广义相对论与量子宇宙学 · 物理学 2008-11-26 J. M. Isidro , J. L. Gonzalez-Santander , P. Fernandez de Cordoba

A new formulation of quantum mechanics based on differential commutator brackets is developed. We have found a wave equation representing the fermionic particle. In this formalism, the continuity equation mixes the Klein-Gordon and…

综合物理 · 物理学 2012-03-21 Arbab I. Arbab , Faisal A. Yassein

The article describes a relation between the fundamental solutions of Dirac's equations for free electron and electron in given electromagnetic field viewed as functionals on bump functions. We explain how classical relativistic mechanics…

数学物理 · 物理学 2015-06-15 A. A. Beilinson

We study the theory of systems with constraints from the point of view of the formal theory of partial differential equations. For finite-dimensional systems we show that the Dirac algorithm completes the equations of motion to an…

高能物理 - 理论 · 物理学 2009-10-28 Werner M. Seiler , Robin W. Tucker

We present a theory of discontinuous motion of particles in continuous space-time. We show that the simplest nonrelativistic evolution equation of such motion is just the Schroedinger equation in quantum mechanics. This strongly implies…

量子物理 · 物理学 2007-05-23 Rui Qi

In our Comment we question the validity of the claim made by the authors of \cite{cc} that their solutions of the Dirac equation in an external {\em time-dependent} electromagnetic field describe beams of electrons. In every time-dependent…

量子物理 · 物理学 2020-06-26 Iwo Bialynicki-Birula , Zofia Bialynicka-Birula

The classical and quantum dynamics of simple time-reparametrization- invariant models containing two degrees of freedom are studied in detail. Elimination of one ``clock'' variable through the Hamiltonian constraint leads to a description…

广义相对论与量子宇宙学 · 物理学 2009-10-28 Ian D. Lawrie , Richard J. Epp

We propose a solution to the problem of time for systems with a single global Hamiltonian constraint. Our solution stems from the observation that, for these theories, conventional gauge theory methods fail to capture the full classical…

广义相对论与量子宇宙学 · 物理学 2015-05-30 Sean Gryb , Karim Thebault

Starting from a generalized Hamilton-Jacobi formalism, we develop a new framework for constructing observables and their evolution in theories invariant under global time reparametrizations. Our proposal relaxes the usual Dirac prescription…

广义相对论与量子宇宙学 · 物理学 2017-11-15 Sean Gryb , Karim Thebault

The equation describing the stochastic motion of a classical particle in 1+1-dimensional space-time is connected to the Dirac equation with external gauge fields. The effects of assigning different turning probabilities to the forward and…

高能物理 - 理论 · 物理学 2016-09-06 Jae-weon Lee , Eok Kyun Lee , Hae Myoung Kwon , In-gyu Koh , Yeong Deok Han

By parametrizing the action integral for the standard Schrodinger equation we present a derivation of the recently proposed method for quantizing a parametrized theory. The reformulation suggests a natural extension from conventional to…

广义相对论与量子宇宙学 · 物理学 2009-11-10 Charles H-T Wang , Smaragda Kessari , Edward R Irvine

Estimating and quantifying uncertainty in unknown system parameters from limited data remains a challenging inverse problem in a variety of real-world applications. While many approaches focus on estimating constant parameters, a subset of…

统计方法学 · 统计学 2023-05-09 Andrea Arnold

We demonstrate that the Dirac representation theory can be effectively adjusted and applied to signal theory. The main emphasis is on orthogonality as the principal physical requirement. The particular role of the identity and projection…

医学物理 · 物理学 2009-10-31 A. Gersten

The hypothesis is suggested that the equation for the Dirac free wave field is, in fact, a group-theoretical relation describing propagation of specific microscopic deviations of space geometry from the euclidean one (closed topological…

量子物理 · 物理学 2007-06-26 O. A. Olkhov

We derive a semiclassical time evolution kernel and a trace formula for the Dirac equation. The classical trajectories that enter the expressions are determined by the dynamics of relativistic point particles. We carefully investigate the…

量子物理 · 物理学 2009-10-31 Jens Bolte , Stefan Keppeler

In the previous paper (quant-ph/0204037) we proved that the quantum mechanics not only has statistic interpretation, but also the specific electromagnetic form. Here, from this point of view we show that all the formal particularities of…

量子物理 · 物理学 2007-05-23 Alexander G. Kyriakos