院士学术报告

发布日期:2018-05-08浏览次数:

  时间:2018年5月12日 08:45-11:30

  地点:江苏大学(镇江市学府路301号)小礼堂


  大会报告1:

  报告题目:广义相对论,黑洞和引力波

  报 告 人:蔡荣根 院士

  工作单位:中国科学院理论物理研究所

  内容提要:

  2016年2月11日美国LIGO科学团队宣布人类第一次直接探测到了引力波。这次引力波事件的波源是二个黑洞的并合事件。引力波的直接探测证实了爱因斯坦100年前基于广义相对论的预言,开启了引力波天文学的新时代。该报告将介绍广义相对论,其二大预言黑洞和引力波及其相关的物理意义。

  蔡荣根简介:

  理论物理学家。中国科学院理论物理研究所研究员。1964年9月出生于浙江省杭州市。1985年毕业于杭州师范学院物理系,1995年于复旦大学获得博士学位。2017年当选为中国科学院院士。

  主要从事引力理论和宇宙学研究。拓扑黑洞的早期研究者之一,提出了Gauss-Bonnet拓扑黑洞解,该解被国际同行称为Boulware-Deser-Cai黑洞解,在引力性质研究方面具有广泛的应用。提出了拓扑德西特时空,证明了渐近德西特时空的视界熵满足共形场论的Cardy-Verlinde公式。从热力学第一定律推导出了描述宇宙动力学的Friedmann 方程,证明了宇宙视界具有霍金辐射,相关温度被国际同行称为Cai-Kim 温度。发表论文200余篇,论文被他引11000余次,曾获国家自然科学奖二等奖,汤森路透全球高被引科学家奖。


  大会报告2:

  报告题目:Exploring the Intrinsic Features of Ideal Glass From Computation

  报 告 人:龚新高 院士

  工作单位:复旦大学物理系

  内容提要:

  Exploring the Intrinsic Features of Ideal Glass From Computation

  X. G. Gong

  Department of Physics,
Fudan University, Shanghai 200433, China

  The nature of glass states has been the long-standing problem in the solid-state physics. With the state-of-art of computational tools locally developed in Fudan, we performed intensive simulations on the thermodynamic properties and explored potential energy surface of an ideal glass which was identified in our own group. We found that the atoms of an ideal glass manifest cooperative diffusion, and show clearly different behavior from the liquid state. By determining the potential energy surface, we demonstrated that the glass state has a flat potential landscape, which is the intrinsic feature of ideal glass. Through manipulating the potential surface, we obtained strong evidence that disordering is not the intrinsic properties of glass, although most of the glasses we know are disorder. With this picture, we could provide some interpretation on the glass transition.

  龚新高简介:

  计算凝聚态物理学家。复旦大学教授。1962年6月生于湖南省长沙县,籍贯湖南长沙。1982年毕业于湖南师范学院物理学系,获学士学位,1985年和1993年于中国科学院固体物理研究所先后获硕士与博士学位。2009年当选美国物理学会会士。2017年当选为中国科学院院士。

  主要从事凝聚态体系结构、电子结构和计算方法发展研究。计算预测了具有反常金属键合特征的金笼子结构。预言了微纳管的硬-软转变,并给出了其转变压强与管径的幂次律。阐明了一类四元半导体的基本物性,提出了该类四元半导体太阳能电池性能的具体优化方案并被实验采用。发展了有限体系等压分子动力学方法、半导体带阶精确计算等新方法。作为第一完成人,先后获得国家自然科学奖二等奖1项(2012)和省部级一等奖2项(2009,2014)。



  大会报告3:

  报告题目:The SULF 10PW and SEL 100PW laser Projects at Shanghai

  报 告 人:李儒新 院士

  工作单位:中国科学院上海光学精密机械研究所

  内容提要:

  The SULF 10PW and SEL 100PW laser Projects at Shanghai

  Ruxin Li, Yuxin Leng, Xiaoyan Liang, Zhizhan Xu

  Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences

  Shanghai 201800,China

  There are several projects in either the preparatory phase or the implementation phase for delivering 10PW laser pulses in the world. We will report the progress of 10PW Shanghai Superintense Ultrafast Laser Facility (SULF) and present a new method that uses a temporal dual-pulse pump beam to suppress the parasitic lasing in large aperture Ti:sapphire crystals. In 2016, the output signal energy of 202.8 J from a 150mm size Ti:S amplifier was obtained, with a signal to pump conversion efficiency of 49.3%. The chirped pulse was compressed by a grating compressor down to 24.0 fs, leading to the output of 5PW laser pulses. In 2017, a similar technology was successfully used to implement the 235mm in diameter Ti:sapphire amplifier which can output 339J chirped pulse. A small part of the laser energy was compressed down to 21fs, indicating that a 10.3PW pulse can be produced if the full energy pulse can be compressed by using large enough gratings. According to the schedule, the 10PW laser facility will be ready in the beginning of 2019 and then opened to users.

  More recently, we have launched the project of Station of Extreme Light (SEL) under the Shanghai Coherent Light Facility (SCLF) at Shanghai. SCLF is a super conducting XFEL facility. As one of stations of SCLF, SEL will be equipped a 100PW laser system. SEL attempts to make use of the two kinds of most intense lasers, i.e. the 100PW optical laser and the TW level hard x-ray laser. The combination of the hard XFEL and the 100PW laser will initiate exploration of vacuum birefringence, acceleration mechanisms leading to ultra-high energy cosmic rays, and so on. The 100 PW laser system will be based on the optical parametric chirped-pulse amplification (OPCPA) approach to realize 1500J/15fs output, with a designed intensity of higher than 1023 W/cm2. According to the plan, the 100PW laser will be available in 2024.

  李儒新简介:

  光学专家。中国科学院上海光学精密机械研究所研究员。1969年10月出生于福建省建瓯市,籍贯福建建瓯。1990年毕业于天津大学精密仪器系光电子技术专业,1995年于中国科学院上海光学精密机械研究所获博士学位。2017年当选为中国科学院院士。

  主要从事超高峰值功率超短脉冲激光与强场激光物理研究。在超高峰值功率超短脉冲激光方面,与合作者一道解决了大口径高增益宽带激光放大器的寄生振荡抑制等关键科学技术问题,建成了拍瓦激光实验装置并取得重要应用成果。在强场激光物理方面,与合作者一道在激光尾波场的级联加速和高性能高能电子束产生、基于亚周期时间尺度相干控制的强场高次谐波与阿秒光源产生等方面取得重要成果。曾获国家自然科学奖二等奖、国家科技进步奖一等奖、中国青年科技奖等。