Black holes in String theory

自从Bekenstein和Hawking的开创性论文以来，人们知道量子力学上的黑洞应该由混合态来描述，这些混合态遵循类似于描述非引力系统的热力学关系。提供一个一致和完整的态(称为微态)的量子力学描述，以从统计上解释上述热力学定律，至今仍是一个挑战。该项目将从弦理论的角度关注这一问题，并旨在更好地表征不同类型黑洞的微态的一般性质。特别是，在弦理论中，黑洞被实现为许多基本成分的束缚状态，如微扰弦状态和膜。不同的技术，从使用ADS/CFT对偶，到在存在D-膜的情况下使用弦振幅，将被用来获得有关微态性质的定量信息。

Since the seminal papers by Bekenstein and Hawking it is known that quantum mechanically black holes should be described by mixed states that obey thermodynamic relations analogous to those describing non-gravitational systems. It is still a challenge today to provide a consistent and complete quantum mechanical description of the states (called microstates) that can explain statistically the thermodynamic laws mentioned above. The project will focus on this problem from a string theory perspective and aims to better characterise the generic properties of the microstates for different types of black holes. In particular, in string theory, black holes are realised as bound states of many basic constituents, such as perturbative string states and branes. Different techniques, ranging from the use of the AdS/CFT duality to that of string amplitudes in presence of D-branes, will be employed to derive quantitative information on the nature of the relevant microstates.