گروه فیزیک انرژیهای بالا
فاز اولمن-اطلاعات سیاهچاله و هولوگرافی
سخنران: J. Kirklin, OIST
12 اسفند 1399
14:00 تا 15:00
Abstract:
In the 1980s, Armin Uhlmann described a natural generalisation of Berry phase to mixed states which has come to be known as Uhlmann phase. I will describe a series of recent results characterising the Uhlmann phase of subsystems in quantum gravity. First, assuming replica wormholes contribute to the path integral, I will show that measurements of the Uhlmann phase of Hawking radiation allows one to reconstruct the phase space of the interior of a black hole (past the Page time), providing a protocol for the recovery of all infalling classical information. This is a generalisation of a previous result concerning entanglement wedges in holography. Next, I describe a path integral formula for the Uhlmann phase of a generic highly entangled system, explaining how it appears to inevitably involve an extra dimension generated by modular flow, despite a lack of any holographic assumptions. Finally, I comment on the operational meaning of Uhlmann phase, and how it's significance may relate to decoherence.
Date: Tuesday, March 2th- ۱۲ اسفند
2 p.m. - 3 p.m. (Tehran time)
Zoom. (click)
Meeting ID: 812 4428 3537
Passcode: 047580