检索结果-南通市图书馆

Fractional Angular Momentum of an Atom on a noncommutative Plane

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2019年第11期71卷 1353-1358页

作者：荆坚张秋月王青隆正文董世海 Department of Physics and Electronic School of ScienceBeijing University of Chemical TechnologyBeijing 100029China Qiu-Yue Zhang College of Physics and Technology Xinjiang UniversityUrumqi 830046China Department of Physics Guizhou UniversityGuiyang 550025China Laboratorio de Informacion Cuantica CIDETECInstituto Politecnico NacionalUPALMCDMX 07700Mexico

The mechanism of obtaining the fractional angular momentum by employing a trapped atom which possesses a permanent magnetic dipole moment in the background of two electric fields is reconsidered by using an alternative method. Then, we generalize this model to a noncommutative plane. We show that there are two different mechanisms,which include cooling down the atom to the negligibly small kinetic energy and modulating the density of electric charges to the critical value to get the fractional angular momentum theoretically.

关键词： noncommutative fractional angular momentum magnetic dipole moment

Solution of the Dipoles in noncommutative Space with Minimal Length

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2019年第6期71卷 640-646页

作者：张梦瑶隆正文龙超云 College of Physics Guizhou University

The single neutral spin-half particle with electric dipole moment and magnetic dipole moment moving in an external electromagnetic field is studied. The Aharonov-Casher effect and He-McKellar-Wilkens effect are emphatically discussed in noncommutative(NC) space with minimal length. The energy eigenvalues of the systems are obtained exactly in terms of the Jacobi polynomials. Additionally, a special case is discussed and the related energy spectra are plotted.

关键词： Neutral spin-half particle noncommutative space minimal length Jacobi polynomials

Maximal Cohen-Macaulay modules over a noncommutative 2-dimensional singularity

在线全文

学校读者我要写书评

暂无评论

Frontiers of Mathematics in China 2019年第5期14卷 923-940页

作者： Xiaoshan QIN Yanhua WANG James ZHANG China Academy of Electronics and Information Technology Beijing 100041China School of Mathematical Sciences Shanghai Center for Mathematical SciencesPudan UniversityShanghai 200433China School of Mathematics Shanghai Key Laboratory of Financial Information TechnologyShanghai University of Finance and EconomicsShanghai 200433China Department of Mathematics University of WashingtonSeattleWA 98195USA

We study properties of graded maximal Cohen-Macaulay modules over an N-graded locally finite,Auslander Gorenstein,and Cohen-Macaulay algebra of dimension two.As a consequence,we extend a part of the McKay corresponden... 详细信息

关键词： noncommutative quasi-resolution Artin-Schelter regular algebra Maximal Cohen-Macaulay module pretzeled quivers

Information Conservation in a noncommutative Quantum Black Hole Based on Canonical Typicality

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2019年第8期71卷 1007-1010页

作者：何东山 College of Physics and Electronic Engineering Xianyang Normal University

A method for calculating the radiation spectrum of an arbitrary black holes was recently proposed by Ma et al.,[Europhys.Lett.122(2018) 30001] in which a non-thermal spectrum of a black hole can be obtained from its entropy using an approach based on canonical typicality.The non-thermal spectrum of a black hole enables a nonzero correlation between the black hole and its radiation, which can ensure that information is conserved during black hole evaporation.In this paper, by using the Kantowski-Sachs metric and Feynman-Hibbs procedure, the entropy of a noncommutative quantum black hole is calculated based on the Wheeler-DeWitt equation.Then, the radiation spectrum of the noncommutative quantum black hole is studied based on canonical typicality method.At last, the correlation between the radiation spectra is calculated.It is shown that the noncommutative effect increases the correlation among radiation and the information remains conserved for noncommutative quantum black holes.

关键词： information conservation noncommutative black hole canonical typicality

Thermodynamics Properties of Confined Particles on noncommutative Plane

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2019年第9期71卷 1047-1053页

作者： Rachid Houca Ahmed Jellal Equipe de Physique Theorique et Hautes Energies Faculte des SciencesUniversite Ibn ZohrP.O.Box8106AgadirMaroc Saudi Center for Theoretical Physics DhahranSaudi Arabia Laboratory of Theoretical Physics Faculty of SciencesChouaib Doukkali UniversityP.O.Box 2024000El JadidaMorocco

We consider a system of N particles living on the noncommutative plane in the presence of a confining potential and study its thermodynamics properties. Indeed, after calculating the partition function, we determine the corresponding internal energy and heat capacity where different corrections are obtained. In analogy with the magnetic field case, we define an effective magnetization and study its susceptibility in terms of the noncommutative parameter θ.By introducing the chemical potential, we investigate the Bose-Einstein condensation for the present system. Different limiting cases related to the temperature and θ will be analyzed as well as some numerical illustration will be presented.

关键词： confining potential noncommutative plane thermodynamics properties Bose-Einstein condensation

noncommutative-Geometry Inspired Charged Wormholes with Low Tidal Forces

在线全文

学校读者我要写书评

暂无评论

Journal of Applied Mathematics and Physics 2017年第3期5卷 574-581页

作者： Peter K. F. Kuhfittig Vance D. Gladney Department of Mathematics Milwaukee School of Engineering Milwaukee WI USA

When Morris and Thorne first proposed that wormholes might be actual physical structures suitable for interstellar travel, they needed to pay close attention to certain traversability conditions such as low tidal forces, which placed severe constraints on the wormhole geometry. Even more problematical was the need for “exotic matter” resulting from the unavoidable violation of the null energy condition required to hold a wormhole open. The purpose of this paper is to overcome these problems by starting with the charged wormhole model of Kim and Lee and assuming a noncommutative-geometry background: the violation of the null energy condition can be attributed to the latter, while the electric charge allows the reduction of the tidal forces to acceptable levels without invoking the trivial zero-tidal-force assumption.

关键词： Charged Wormholes noncommutative Geometry Tidal Constraints

Particles and Scalar Waves in noncommutative Charged Black Hole Spacetime

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2015年第7期64卷 1-8页

作者： Piyali Bhar Farook Rahaman Ritabrata Biswas U.F.Mondal Department of Mathematics Jadavpur University Department of Mathematics Krishnagar Women’s College Department of Mathematics Behala College

In this paper we have discussed geodesics and the motion of test particle in the gravitational field of noncommutative charged black hole spacetime. The motion of massive and massless particle have been discussed seperately.A comparative study of noncommutative charged black hole and usual Reissner–Nordstr¨om black hole has been done.The study of effective potential has also been included. Finally, we have examined the scattering of scalar waves in noncommutative charged black hole spacetime.

关键词： test particle scalar waves noncommutative charged

noncommutative Multi-Solitons in a Modified Chiral Model in 2+1 Dimensions

在线全文

学校读者我要写书评

暂无评论

Communications in Mathematical Research 2009年第4期25卷 349-360页

作者： ZHU XIU-JUAN School of Mathematical Sciences Yangzhou University Yangzhou Jiangsu 225002

Multi-soliton configurations of a Moyal-type noncommutative deformed modified 2＋1 chiral model have been constructed by dressing method several years ago. These configurations have no-scattering property. By making a second-order pole in the dressing ansatz, two-soliton configurations with genuine soliton-soliton interaction were constructed after that. We go on in this paper to construct a large family of multi-soliton configurations with scattering property by using the noncom- mutative extension of B/icklund transformations defined by Dai and Terng in a recent paper

关键词： noncommutative star product Moyal-Weyl map Baicklund transformation

Jacobson-Bourbaki Correspondence Theorem for noncommutative Rings

在线全文

学校读者我要写书评

暂无评论

Journal of Donghua University(English Edition) 2019年第1期36卷 23-26页

作者：冯江超申冉张建刚 College of Science Donghua University Department of Mathematics Shanghai Normal University

In algebra, the Jacobson-Bourbaki theorem is especially useful for generalizations of the Galois theory of finite, normal and separable field extensions. It was obtained by Jacobson for fields and extended to division rings by Jacobson and Cartan who credited the result to unpublished work by Bourbaki. In 2005, the Jacobson-Bourbaki correspondence theorem for commutative rings was formulated by Winter. And this theorem for augmented rings was formulated by Kadison in 2012. In this paper, we prove the Jacobson-Bourbaki theorem for noncommutative rings which is finitely generated over their centers. We establish a bijective correspondence between the set of subdivisions which are right finite codimension in A and the set of Galois rings of the additive endomorphisms End A of A which is finitely generated over its center.

关键词： noncommutative rings Galois rings simple module