Program
Quantum Aspects of Black Holes
Student No.:80
Time:Wed 16:30-17:30, Oct.31
Instructor:Dieter Lüst  
Place:Lecture hall, Jin Chun Yuan West Bldg.
Starting Date:2018-10-31
Ending Date:2018-10-31

Abstract:
Although there is direct experimental evidence for the existence of black holes from the recent measurements of gravitational waves, black holes are still mysterious objects from the theoretical point of view.

According to the seminal work of Stephen Hawking, all information about the collapsing matter that forms a black hole is lost during the evaporation of Hawking radiation. This loss of information is in sharp conflict with the rules of quantum mechanics. It is also closely related to the no hair theorem of classical black holes, which states a black hole cannot carry any other quantum numbers other than its mass, charge or its angular momentum.

Hence it is mandatory to understand in a quantum theory of gravity what are the carriers of information in a black hole and which kind of quantum hair can be attributed to black holes.

In this talk, I will first review how the quantum entropy of black holes emerges in string theory. Furthermore I will also discuss a complementary picture for the hair of neutral Schwarzschild black holes. This part is based on some recent developments related to asymptotic symmetries in gravity. Finally I give some remarks on black holes as quantum computers.


About speaker:
Dieter Lüst is a German physicist, full professor for mathematical physics at the Ludwig Maximilians University of Munich since 2004 and director of the Max Planck Institute for Physics in Munich. His research focuses on string theory. In 2000, he received the Gottfried Wilhelm Leibniz Prize of the Deutsche Forschungsgemeinschaft, which is the highest honour awarded in German research.



摘要:
尽管利用引力波测量的实验数据可以直接证明黑洞的存在,但从理论的角度来看,黑洞仍然是神秘的物体。根据史蒂芬·霍金的开创性研究,在霍金辐射的蒸发过程中,所有形成黑洞的暗物质的信息是丢失的。丢失的信息与现有量子力学的规则有很大的冲突。

同时,它也与黑洞经典的无毛定理密切相关,它表明除了本身的质量、电荷或角动量之外,黑洞不能携带任何其他的量子数。这就要求我们必须从引力的量子理论来理解黑洞信息的载体,以及什么样的“量子毛”可以对黑洞有贡献。

在此次报告中,主讲人将首先回顾黑洞的量子熵是如何从弦理论中导出,并基于近期在引力中渐进对称方面的进展对史瓦西黑洞的"毛"做进一步的补充描述。最后主讲人将会对黑洞作为量子计算机做一些探讨。


报告人简介:
Dieter Lüst自2004年起在慕尼黑大学任数学物理全职教授,同时担任德国马克斯·普朗克物理学研究所主任,研究领域主要为弦理论。2000年,Lüst教授获德国科研最高奖“莱布尼茨奖”。该奖是目前世界上奖金额度最高的科学奖项之一,在德国学界地位仅次于诺贝尔奖。