1 Symmetries of a Classical System

2008 ◽  
pp. 7-8
Author(s):  
Franco Strocchi
Keyword(s):  
Classical System

scholarly journals Efficient Numerical Evaluation of Thermodynamic Quantities on Infinite (Semi-)classical Chains

2021 ◽  
Vol 182 (3) ◽  
Author(s):  
Christian B. Mendl ◽  
Folkmar Bornemann
Keyword(s):  
Transfer Operator ◽  
Classical System ◽  
Free Energy Density ◽  
Classical Particle ◽  
Thermodynamic Quantities ◽  
Nls Equation ◽  
Classical Systems ◽  
Particle Chain ◽  
Dynamics Simulations ◽  
Good Agreement

AbstractThis work presents an efficient numerical method to evaluate the free energy density and associated thermodynamic quantities of (quasi) one-dimensional classical systems, by combining the transfer operator approach with a numerical discretization of integral kernels using quadrature rules. For analytic kernels, the technique exhibits exponential convergence in the number of quadrature points. As demonstration, we apply the method to a classical particle chain, to the semiclassical nonlinear Schrödinger (NLS) equation and to a classical system on a cylindrical lattice. A comparison with molecular dynamics simulations performed for the NLS model shows very good agreement.

The Inconsistency or Redundancy of the Wage-Fund Doctrine in a Classical System

1994 ◽  
Vol 26 (3) ◽  
pp. 369-393
Author(s):  
M. Perlman
Keyword(s):  
Classical System

Instability of Discrete Pseudo-Conservative Structural Systems

1991 ◽  
Vol 44 (11S) ◽  
pp. S194-S198 ◽  
Author(s):  
Anibal E. Mirasso ◽  
Luis A. Godoy
Keyword(s):  
Classical System ◽  
Potential Energy Function ◽  
Structural Systems ◽  
Equilibrium Path ◽  
Equilibrium Equations ◽  
Total Potential ◽  
Approximate Form ◽  
Nonlinear Equilibrium ◽  
Mechanical Models ◽  
New Formulation

Critical and postcritical states of pseudo-conservative discrete structural systems are studied by means of a new formulation leading to a classification of critical states and to an approximate form of the postcritical equilibrium path. The nonlinear equilibrium equations are derived from the total potential energy function of a classical system, but with the addition of at least one control parameter. The follower force effect is thus included by nonlinear constraints to the equilibrium equation. The nonlinear equations are solved by perturbation techniques. Finally the theory is applied to investigate the instability of some simple mechanical models.

MONODROMY APPROACH TO QUANTUM COMPUTING

2002 ◽  
Vol 16 (30) ◽  
pp. 4593-4605 ◽  
Author(s):  
G. GIORGADZE
Keyword(s):  
Quantum Computing ◽  
Hilbert Problem ◽  
Holomorphic Vector Bundle ◽  
Classical System ◽  
Unitary Operators ◽  
Unitary Matrices ◽  
Classical Procedure ◽  
Logarithmic Singularities ◽  
The Given ◽  
Riemann Hilbert Problem

In this work, a gauge approach to quantum computing is considered. It is assumed that there exists a classical procedure for placing certain classical system in a state described by a holomorphic vector bundle with connection with logarithmic singularities. This bundle and its connection are constructed with the aid of unitary operators realizing the given algorithm using methods of the monodromic Riemann–Hilbert problem. Universality is understood in the sense that for any collection of unitary matrices there exists a connection with logarithmic singularities whose monodromy representation involves these matrices.

QUANTIZATION OF ENTROPY SPECTRA OF BLACK HOLES

2013 ◽  
Vol 22 (02) ◽  
pp. 1330001 ◽  
Author(s):  
YONGJOON KWON ◽  
SOONKEON NAM
Keyword(s):  
Black Holes ◽  
Black Hole ◽  
Correspondence Principle ◽  
Scattering Problem ◽  
Classical System ◽  
Quasinormal Modes ◽  
Entropy Spectrum ◽  
Total Transmission ◽  
Transmission Modes ◽  
Characteristic Modes

From the quasinormal modes (QNM) of black holes, we obtain the quantizations of the entropy and horizon area of black holes via Bohr–Sommerfeld quantization, based on Bohr's correspondence principle. For this, we identify the appropriate action variable of the classical system corresponding to a black hole. By considering the BTZ black holes in topologically massive gravity as well as Einstein gravity, it is found that the spectra of not the horizon areas but the entropies of black holes are equally spaced. We also propose that other characteristic modes of black holes, which are non-QNM or holographic QNM, can be used in quantization of entropy spectra just like QNM. From these modes, it is found that only the entropy spectrum of the warped AdS3 black hole is equally spaced as well. Furthermore, by considering a scattering problem in a black hole, we propose that the total transmission modes and total reflection modes of black holes can be regarded as characteristic modes of black holes and result in the equally spaced entropy of the Kerr and Reissner–Nordström black holes. Finally, we conclude that there is a universal behavior that the entropy spectra of various black holes are equally spaced.

scholarly journals A First Approach to Loop Quantum Gravity in the Momentum Representation

2019 ◽  
pp. 1-8
Author(s):  
W. F. Chagas-Filho
Keyword(s):  
General Relativity ◽  
Quantum Gravity ◽  
Loop Quantum Gravity ◽  
Classical System ◽  
Momentum Representation ◽  
First Order

We present a generalization of the first-order formalism used to describe the dynamics of a classical system. The generalization is then applied to the first-order action that describes General Relativity. As a result we obtain equations that can be interpreted as describing quantum gravity in the momentum representation.

scholarly journals PENGARUH PENGGUNAAN VIDEO PEMBELAJARAN DAN MINAT BELAJAR TERHADAP HASIL BELAJAR MATA KULIAH PENGANTAR MANAJEMEN PADA PROSES PEMBELAJARAN JARAK JAUH DI MASA PANDEMI COVID 19.

2021 ◽  
Vol 5 (2) ◽  
Author(s):  
Siti Sahara ◽  
Sugeng Priyanto
Keyword(s):  
Distance Learning ◽  
Learning Outcomes ◽  
Learning Process ◽  
Large Scale ◽  
Classical System ◽  
Learning System ◽  
Student Interest ◽  
Study Program ◽  
Ex Post ◽  
Data Collection Technique

Currently, Covid-19 is a hot topic of conversation in all countries, including Indonesia. In Indonesia itself, a Large-Scale Social Restriction (PSBB) policy was implemented to suppress the spread of this virus so that all activities carried out outside the home must be stopped until this pandemic has subsided. The imposition of Large-Scale Social Restrictions (PSBB) made the learning system change from a classical system to a Distance Learning (PJJ) or online system. In the Introduction to Management course, student participation was found to be low during the learning process. Lecturers have difficulty determining whether students take learning seriously or not. Often in distance learning, some students deliberately put up a video that has been recorded, so that it seems like they are following the learning process, but in reality, they are doing something else. This is caused by several factors, including media which can be in the form of video lessons and student interest in learning. Looking at the description above, researchers are interested in conducting research that aims to determine the effect of using video learning and learning interest on learning outcomes in the Management Introduction course in the distance learning process during the Covid 19 pandemic. This research was conducted in the D3 Transportation Study Program, Faculty of Engineering, the State University of Jakarta in semester 113 of the 2020/2021 school year. This research is an ex post facto research with a quantitative approach. The number of samples in this study consisted of 76 students. The data collection technique is done by using questionnaires and documentation. The data obtained were analyzed using a multiple regression test. The results of this study indicate that Fcount ≥ Ftable = 13.53 ≥ 3.124 so it can be concluded that there is a significant influence between the use of instructional videos (X1) and interest (X2) on learning outcomes in the Introduction to Management (Y) course. For this reason, the role of lecturers is indispensable in continuously making creative innovations in developing various kinds of learning media that can increase student interest in learning during the Covid 19 pandemic. 

Quantization of a classical system on a coadjoint orbit of the Poincaré group in 1+1 dimensions

1994 ◽  
Vol 35 (9) ◽  
pp. 4405-4422 ◽  
Author(s):  
S. Twareque Ali ◽  
Ute A. Mueller
Keyword(s):  
Classical System ◽  
Coadjoint Orbit ◽  
Poincaré Group ◽  
Poincare Group

Production of Electricity in Photovoltaic Systems for Administrative Buildings in Romania, Technical and Economic Analysis

2014 ◽  
Vol 659 ◽  
pp. 431-434
Author(s):  
Cătălin George Popovici ◽  
Marius Costel Balan ◽  
Marina Verdeș ◽  
Vasilică Ciocan ◽  
Andrei Burlacu ◽  
...  
Keyword(s):  
Technological Development ◽  
Classical System ◽  
Electrical Energy ◽  
Point Of View ◽  
Past Century ◽  
Photovoltaic Systems ◽  
Pronounced Increase ◽  
Economic Point ◽  
Electricity Grid ◽  
Solar Radiation Intensity

One of the effects of technological development of all human societies over the past century is more pronounced increase in energy consumption, but more pronounced dependence on fossil fuel consumption, especially as oil, natural gas and coal.The paper presents a comparative analysis of technical and economic point of view of two systems, the first using the classical system (national electricity grid) and the second using the new unconventional technology with photovoltaic systems for administrative building in rural areas.For correct evaluation of the performance of this systems providing electrical energy requires some assumptions about the consumption of electricity, the solar radiation intensity, the energy cost and the climate zones of the location.

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