Gravity's Hologram 
TYPE  Colloquium 
Speaker:  Professor Hirosi Ooguri 
Affiliation:  Caltech 
Date:  07.06.2012 
Time:  16:30 
Location:  Lidow Rosen Auditorium (323) 
Abstract: 
At the Planck scale, where general relativity and quantum mechanics are unified, the hierarchical structure of nature is expected to terminate. Space and time do not exist beyond the Planck scale, and they should emerge from something more fundamental. Superstring theory has provided an insight into the emergence of space and time at the Planck scale. Hologram is a term in optics, and it means encoding geometric data of a 3dimensional object on a 2dimensional surface so that the 3dimensional image can be reconstructed later. In superstring theory, all the phenomena in quantum gravity can be projected onto a screen located at boundaries of space, and they can be described using a quantum theory without gravity on the screen. Borrowing the terminology of optics, this idea is called gravity's hologram. I will discuss motivations and implications of this new description of quantum theory of gravity. At the Planck scale, where general relativity and quantum mechanics are unified, the hierarchical structure of nature is expected to terminate.Space and time do not exist beyond the Planck scale, and they shouldemerge from something more fundamental. Superstring theory has provided aninsight into the emergence of space and time at the Planck scale. Hologramis a term in optics, and it means encoding geometric data of a3dimensional object on a 2dimensional surface so that the 3dimensionalimage can be reconstructed later. In superstring theory, all the phenomenain quantum gravity can be projected onto a screen located at boundaries ofspace, and they can be described using a quantum theory without gravity onthe screen. Borrowing the terminology of optics, this idea is calledgravity's hologram. I will discuss motivations and implications of thisnew description of quantum theory of gravity.
