Time: 22:30pm (UTC/GMT+08:00, Beijing/Shanghai), Apr. 20 (Mon.), 2020

Online Meeting Room (zoom.com): click here to join the meeting

Meeting ID: 817 624 903

Speaker: Edgar Shaghoulian (Cornell)

Abstract:

The information paradox can be realized in two-dimensional models of gravity. In this setting, we show that the large discrepancy between the von Neumann entropy as calculated by Hawking and the requirement of unitarity is fixed by including new saddles in the gravitational path integral. These saddles arise in the replica method as wormholes connecting different copies of the black hole. We will discuss their appearance both in asymptotically AdS and asymptotically flat theories of gravity.