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Hawking Evaporation for the 2+1 Dimensional Radiating Black Hole

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Chinese Physics Letters 1995年第7期12卷 446-448页

作者： cai ronggen ZHANG Yijun SU Rukeng Department of Physics Fudan UniversityShanghai 200433 CCAST(World Laboratory) P.O.Box 8730Beijing 100080

By using a metric which is a counterpart of four dimensional Vaidya metric,we have investigated the Hawking evaporation of the 2+1 dimensional radiating black *** Hawking temperature of this radiating black hole is **... 详细信息

关键词： Hawking black radiating

Introduction to holographic superconductor models

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Science China(Physics,Mechanics & Astronomy) 2015年第6期58卷 1-46页

作者： cai ronggen LI Li LI LiFang YANG RunQiu State Key Laboratory of Theoretical Physics Institute of Theoretical PhysicsChinese Academy of Sciences Crete Center for Theoretical Physics Department of PhysicsUniversity of Crete State Key Laboratory of Space Weather Center for Space Science and Applied ResearchChinese Academy of Sciences

In the last years it has been shown that some properties of strongly coupled superconductors can be potentially described by classical general relativity living in one higher dimension,which is known as holographic *** paper gives a quick and introductory overview of some holographic superconductor models with s-wave,p-wave and d-wave orders in the literature from point of view of bottom-up,and summarizes some basic properties of these holographic models in various *** competition and coexistence of these superconductivity orders are also studied in these superconductor models.

关键词： holographic duality superconductivity classical theories of gravity conformal field theory

Exploring the doubly charmed baryon

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Science China(Physics,Mechanics & Astronomy) 2020年第2期63卷 7-7页

作者： ronggen cai Institute of Theoretical Physics Chinese Academy of Sciences

The doubly charmed baryon,like the proton and neutron,is formed by three ***,they are different,as such a baryon consists of two heavy quarks(charm-quark)and one light quark,while the proton and neutron respectively contain three light *** the doubly charmed baryon is expected to have different internal structures and *** example,its mass is 3-4 times higher than those of the proton and *** the doubly charmed baryons can provide important information to understand the three-body bound system,the hadronic interaction and the quark model.

关键词： properties. quark doubly

Hunting the doubly charmed baryon with strangeness

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Science China(Physics,Mechanics & Astronomy) 2021年第10期64卷 1-1页

作者： ronggen cai CAS Key Laboratory of Theoretical Physics Institute of Theoretical PhysicsChinese Academy of SciencesBeijing 100190China

In the standard model of particle physics, the baryon is formed by three quarks. Unlike the well-known proton and neutron that are composed of three light quarks, the doubly charmed baryon consists of two heavy charm quarks and a light ***, it is expected to have different internal structures and properties, and to serve as a unique system for understanding the three-body bound system and testing the mechanism of quantum chromodynamics (QCD).

关键词： quark doubly system

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Editorial

Science China(Physics,Mechanics & Astronomy) 2018年第10期61卷 1-1页

作者： YueLiang Wu ronggen cai YuFeng Zhout University of Chinese Academy of Sciences Beijing 100049 China Institute of Theoretical Physics Chinese Academy of Sciences Beijing 100190 China

The paradigm that our universe is dominated by non-luminous matter, i.e., dark matter, rather than ordinary baryonic matter, has been established since the 1980s. However, the nature of dark matter remains almost unknown. Many ongoing space experiments are aiming at uncovering the particle nature of dark matter via precise measurements of the flux of cosmic-ray particles, with a hope to find fingerprints that tiny annihilations or decays of dark matter may have left. Such experiments include PAMELA, Fermi-LAT, and AMS-02, all of them have made extraordinary discoveries. The DAMPE experiment is a new player in the game. The key component of the DAMPE detector is a calorimeter with both a large acceptance and a long radiation length, which makes it unique for dark matter research. For instance, DAMPE is capable of detecting a cosmic-ray electron with a maximum energy of-10 TeV.

关键词：编辑粒子性质空间实验暗物质关键部件宇宙播放器热量计

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黑洞的本质

科学通报 2016年第19期61卷 2083-2092页

作者：蔡荣根曹利明中国科学院理论物理研究所北京100190 中国科学技术大学物理学院合肥230026

什么是黑洞?这个问题颇难回答.对于普通大众来说,黑洞是一种在科幻题材中经常出现的奇怪天体.而对于相关的研究人员来说,黑洞是时空中连光都逃脱不出的区域,在宇宙中实实在在的存在.虽然认识的水平有所不同,但黑洞这个物理对象对他们来... 详细信息

什么是黑洞?这个问题颇难回答.对于普通大众来说,黑洞是一种在科幻题材中经常出现的奇怪天体.而对于相关的研究人员来说,黑洞是时空中连光都逃脱不出的区域,在宇宙中实实在在的存在.虽然认识的水平有所不同,但黑洞这个物理对象对他们来说都是神秘的,神秘到至今为止我们也不能够真正地理解它.如果人们再追问:黑洞的本质是什么?不同的人也许有不同的理解.甚至有时候从事黑洞物理研究的学者们所给出的答案也会大相径庭.本文不试图给出博人眼球的解答,而是倾向于告诉读者学术界关于这一问题的主流理解方式.

关键词：黑洞引力量子引力

The next detectors for gravitational wave astronomy

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Science China(Physics,Mechanics & Astronomy) 2015年第12期58卷 91-124页

作者： BLAIR David JU Li ZHAO ChunNong WEN LinQing MIAO HaiXing cai ronggen GAO JiangRui LIN XueChun LIU Dong WU Ling-An ZHU ZongHong HAMMOND Giles PAIK Ho Jung FAFONE Viviana ROCCHI Alessio BLAIR Carl MA YiQiu QIN JiaYi PAGE Michael School of Physics The University of Western Australia School of Physics and Astronomy University of Birmingham State Key Laboratory of Theoretical Physics Institute of Theoretical Physics Chinese Academy of Sciences The School of Physics & Electronic Engineering Shanxi University Laboratory of All-Solid-State Light Sources Institute of Semiconductors Chinese Academy of Science State Key Laboratroy of Modern Optical Instrumentation Department of Optical Engineering Zhejiang University Laboratory of Optical Physics Institute of Physics Chinese Academy of Sciences Gravitational Wave and Cosmology Laboratory Department of Astronomy Beijing Normal University School of Physics and Astronomy SUPA University of Glasgow Department of Physics University of Maryland College Park University of Rome Tor Vergata INFN Roma Tor Vergata

This paper focuses on the next detectors for gravitational wave astronomy which will be required after the current ground based detectors have completed their initial observations, and probably achieved the first direct detection of gravitational waves. The next detectors will need to have greater sensitivity, while also enabling the world array of detectors to have improved angular resolution to allow localisation of signal sources. Sect. 1 of this paper begins by reviewing proposals for the next ground based detectors,and presents an analysis of the sensitivity of an 8 km armlength detector, which is proposed as a safe and cost-effective means to attain a 4-fold improvement in sensitivity. The scientific benefits of creating a pair of such detectors in China and Australia is emphasised. Sect. 2 of this paper discusses the high performance suspension systems for test masses that will be an essential component for future detectors, while sect. 3 discusses solutions to the problem of Newtonian noise which arise from fluctuations in gravity gradient forces acting on test masses. Such gravitational perturbations cannot be shielded, and set limits to low frequency sensitivity unless measured and suppressed. Sects. 4 and 5 address critical operational technologies that will be ongoing issues in future detectors. Sect. 4 addresses the design of thermal compensation systems needed in all high optical power interferometers operating at room temperature. Parametric instability control is addressed in sect. 5. Only recently proven to occur in Advanced LIGO, parametric instability phenomenon brings both risks and opportunities for future detectors. The path to future enhancements of detectors will come from quantum measurement technologies. Sect. 6 focuses on the use of optomechanical devices for obtaining enhanced sensitivity, while sect. 7 reviews a range of quantum measurement options.

关键词： future gravitational wave detectors opto-mechanics quantum limit

营造良好基础研究环境,助力创新驱动发展战略

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科技导报 2019年第12期37卷 7-8页

作者：蔡荣根中国科学院理论物理研究所

基础研究是科技创新的源头,是推进技术进步和社会进步的发动机。习近平总书记指出:“基础研究是整个科学体系的源头,是所有技术问题的总机关。”深刻阐述了基础研究和技术突破的关系,没有基础研究的原理性突破就无法实现引领性、颠覆新... 详细信息

基础研究是科技创新的源头,是推进技术进步和社会进步的发动机。习近平总书记指出:“基础研究是整个科学体系的源头,是所有技术问题的总机关。”深刻阐述了基础研究和技术突破的关系,没有基础研究的原理性突破就无法实现引领性、颠覆新技术的突破。

关键词：基础研究创新驱动技术进步环境科技创新社会进步科学体系发动机

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并合双星系统的引力波理论模型

科学通报 2016年第14期61卷 1525-1535页

作者：蔡荣根曹周键韩文标中国科学院理论物理研究所北京100190 中国科学院数学与系统科学研究院北京100190 中国科学院上海天文台上海200030

引力波直接探测已经被LIGO成功实现.在GW150914的数据处理中引力波理论模型起到了关键作用.理论模型不仅从原始数据的噪声中挖掘出引力波信号,使得探测结果的置信度达到5.1σ,而且还证认出其波源是并合的双黑洞.除了LIGO这样的地面引力... 详细信息

引力波直接探测已经被LIGO成功实现.在GW150914的数据处理中引力波理论模型起到了关键作用.理论模型不仅从原始数据的噪声中挖掘出引力波信号,使得探测结果的置信度达到5.1σ,而且还证认出其波源是并合的双黑洞.除了LIGO这样的地面引力波探测器,还有脉冲星计时计划和空间引力波探测计划等.在所用的这些引力波探测计划中,理论模型都扮演着信号提取和波源反演的重要角色.随着引力波天文学的逐渐开展,理论模型研究的重要性和紧迫性将变得越来越明显.双星系统是上述所有引力波探测计划最为重要和最为现实的波源.本文对双星系统的引力波理论模型研究现状作一个概括性介绍,并指出存在的问题和以后可能的研究方向.

关键词：引力波双星系统数值相对论后牛顿近似黑洞微扰理论爱因斯坦方程