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Quasinormal Spectrum and Quantization of the Kerr-Newman Black Hole

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Chinese Physics Letters 2008年第3期25卷 858-861页

作者：荆继良丁持坤 Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control (Ministry of Education) Institute of Physics Hunan Normal University Changsha 410081

The intermediate asymptotic quasinormal mode spectrum of the charged scalar and Dirac fields in the near extremal Kerr-Newman black hole is studied analytically, It is found that the quasinormal mode spectrum can be expressed in terms of the Hawking temperature Thb, the electric potential Ф＋ and the horizon＇s angular velocity ΩH for the case of （eФ_ ＋ mΩH）〉（1 - 4πThb）Re（ω）（where e is the charge and m is the azimuthal projection number）, whereas it is only relevant to the charge and the mass parameter for another case. It is also shown that by using the Bohr＇s correspondence principle, the fundamental change in the black-hole surface area induced by the emission of a rotating charged quantum from the Kerr-Newman black hole is in accord with the Bekenstein-Mukhanov general prediction.

关键词： NORMAL-MODES FIELD

Gravitational Perturbations in Einstein Aether Black Hole Spacetime

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Chinese Physics Letters 2018年第10期35卷 5-8页

作者： Chi-Kun Ding Department of Physics Hunan University of Humanities Science and Technology Loudi 417000 Key Laboratory of Low Dimensional Quantum Structures and Quantum Control of Ministry of Education and Synergetic Innovation Center for Quantum Effects and Applications Hunan Normal University Changsha 410081

We study the gravitational perturbations in Einstein aether black hole spacetime and find that the quasinormal modes（QNMs） of the first kind of aether black hole are similar to that of a Lorentz violation（LV） model,the quantum electrodynamics（QED） extension limit of standard model extension. These similarities between completely different backgrounds may imply that LV in the gravity sector and LV in the matter sector have some connections： damping QNMs more rapidly and prolonging its oscillation period. Compared to the Schwarzschild case, the first kind of black holes have larger damping rates and the second ones have lower damping rates, and they all have smaller real oscillation frequency. These differences could be detected by the new generation of gravitational antennas.

关键词： Black holes

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热力学统计物理学课程教学经验浅谈

科教导刊 2012年第14期 56-56,107页

作者：丁持坤肖月华湖南人文科技学院湖南娄底417000

本文介绍了热力学统计物理教学中的几点经验:熟悉教材,以科研促教,重视师生互动,重视总结和归纳。

关键词：热力学统计物理教学研究

Finite entropy of Schwarzschild anti-de Sitter black hole in different coordinates

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Chinese Physics B 2007年第12期16卷 3610-3615页

作者：丁持坤荆继良 Institute of Physics Hunan Normal University Key Laboratory of Quantum Structures and Quantum Control (Hunan Normal University) Ministry of Education Changsha 410081 China

This paper studies the finite statistical-mechanical entropy of the Schwarzschild anti-de Sitter （ADS） spacetime arising from quantum massless scalar field by using the ＇brick wall＇ approach in the Painlev; and Lemaaitre coordinates. At first glance, it seems that the results would be different from that in the Schwarzschild-like coordinate since both the Painlev; and the Lemaitre spacetimes do not possess the event horizon obviously. However, this paper proves that the entropies in these coordinates are exactly equivalent to that in the Schwarzschild-like coordinate.

关键词： black hole, entropy, Painlev coordinate, Lemaitre coordinate

大众化高等教育时代地方院校物理学专业面临的办学危机与对策探索

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湖南人文科技学院学报 2014年第1期31卷 107-110页

作者：丁持坤肖月华湖南人文科技学院物理与信息工程系湖南娄底417000

大众化高等教育时代背景下,地方本科院校由物理教育专业经过升本改造后的物理学专业,面临着招生每况愈下的办学危机。产生危机的原因在于升本后的办学目标不明确和就业市场的变化。要通过明确办学方向、制定合理的培养规格和课程体系、... 详细信息

大众化高等教育时代背景下,地方本科院校由物理教育专业经过升本改造后的物理学专业,面临着招生每况愈下的办学危机。产生危机的原因在于升本后的办学目标不明确和就业市场的变化。要通过明确办学方向、制定合理的培养规格和课程体系、不断改革创新、谋划申报专业学位硕士点等途径,使传统专业焕发生机活力。

关键词：大众化高等教育物理学专业地方本科院校

Slowly rotating Einstein-bumblebee black hole solution and its greybody factor in a Lorentz violation model

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Chinese Physics C 2021年第2期45卷 588-597页

作者： Chikun Ding Xiongwen Chen Department of Physics Huaihua UniversityHunanHuaihua 418008China Department of Physics Hunan University of HumanitiesScience and TechnologyHunanLoudi 417000China Key Laboratory of Low Dimensional Quantum Structures and Quantum Control of Ministry of Education and Synergetic Innovation Center for Quantum Effects and ApplicationsHunan Normal UniversityChangsha 410081China

We obtain an exact slowly rotating Einstein-bumblebee black hole solution by solving the corresponding rr and tθ components of the gravitational field equations for both cases:A)b u=(0,b(r),0,0) and B) bu=(0,b(r),b(θ),0) .Then,we check the other gravitational field equations and the bumblebee field motion equations using this *** find that for case A,there indeed exists a slowly rotating black hole solution for an arbitrary LV(Lorentz violation)coupling constant l;however,for case B,this slowly rotating solution exists if and only if coupling constant l is as small as or smaller than angular momentum *** far,no full rotating black hole solution has been published;hence,the Newman-Janis algorithm cannot be used to generate a rotating solution in the Einstein-bumblebee *** is similar to the Einstein-aether theory,wherein only some slowly rotating black hole solutions *** study the effects of this broken Lorentz symmetry,we consider the black hole greybody factor and find that,for angular index l=0 ,LV constant l decreases the effective potential and enhances the absorption probability,which is similar to the results for the non-minimal derivative coupling theory.

关键词： Lorentz violation black hole solution greybody factor bumblebee field

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应用型高校物理专业转型发展方案研究

科教导刊 2017年第9期 20-21页

作者：丁持坤唐淑红李强肖月华湖南人文科技学院信息学院湖南娄底417000

应用型高校物理专业的转型发展,要以行业背景为基础,以国家宏观政策为引导,更好地促进物理这门基础学科的发展。按照人才市场需求和学术发展的双重标准,修订培养方案。按照人人能成才、成才多样化的观念创新教学模式。按照教育公平、德... 详细信息

应用型高校物理专业的转型发展,要以行业背景为基础,以国家宏观政策为引导,更好地促进物理这门基础学科的发展。按照人才市场需求和学术发展的双重标准,修订培养方案。按照人人能成才、成才多样化的观念创新教学模式。按照教育公平、德育为先、能力为重的理念改革考核方式。按照教学、科研、服务的三大职能加快师资队伍转型发展。

关键词：应用型高校物理专业转型发展

美国贝勒大学物理系和物理师范专业课程体系介绍

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科教导刊 2016年第10期 5-7,28页

作者：丁持坤肖月华唐淑红刘长青湖南人文科技学院信息学院湖南娄底417000

本文较为全面地介绍了贝勒大学物理系及物理师范专业的课程体系。可以看出,与我国类似,贝勒物理系招生人数偏少。另外,贝勒物理系专业设置合理,可获得学位选择性很大;课程体系宽而深,强调跨学科发展。物理师范教育脱离物理系,由教育学... 详细信息

本文较为全面地介绍了贝勒大学物理系及物理师范专业的课程体系。可以看出,与我国类似,贝勒物理系招生人数偏少。另外,贝勒物理系专业设置合理,可获得学位选择性很大;课程体系宽而深,强调跨学科发展。物理师范教育脱离物理系,由教育学院承担,强调跨学科和教学实践。它山之石,可以攻玉,这些特点无疑对我国地方本科院校物理专业转型发展有着重要的启示意义。

关键词：物理专业物理师范专业课程体系

Effects of Homogeneous Plasma on Strong Gravitational Lensing of Kerr Black Holes

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Chinese Physics Letters 2017年第9期34卷 24-28页

作者： Chang-Qing Liu Chi-Kun Ding Ji-Liang Jing Department of Physics Hunan University of Humanities Science and Technology Loudi 417000 Department of Physics and Key Laboratory of Low Dimensional Quantum Structures and Quantum Control of Ministry of Education Hunan Normal University Changsha 410081

Considering the Kerr black hole surrounded by a homogeneous unmagnetized plasma medium, we study the strong gravitational lensing on the equatorial plane of the Kerr black hole. It is found that the presence of the uniform plasma can increase the photon-sphere radius r_{／rm ps}, the coefficients ／bar{a} and ／bar{b}, the angular position of the relativistic images （／theta_{／infty}）, the deflection angle ／alpha（／theta） and the angular separation s. However, the relative magnitude r_{／rm m} decreases in the presence of the uniform plasma medium. It is also shown that the impact of the uniform plasma on the effect of strong gravitational lensing becomes smaller as the spin of the Kerr black hole increases in the prograde orbit （a〉0）. In particular, for the extreme black hole （a=0.5）, the effect of strong gravitational lensing in the homogeneous plasma medium is the same as the case in vacuum for the prograde orbit.

关键词： Effects of Homogeneous Plasma on Strong Gravitational Lensing of Kerr Black Holes