|Tuesday 2 March 2021|
|Events for day: Tuesday 2 March 2021|
| 14:00 - 15:00 Weekly Seminar|
Condensed Matter and Statistical Physics Group
Possible long range magnetic order in 2D monolayers
In the past decade there has seen an explosion of interest in two dimensional monolayers which started from an atom-thick plane of carbon known as graphene. The low dimensional material opens a new window over the many technological applications and new emerging science. Different two dimensional monolayers had been discovered with a wide range of Physical properties such as metals, semiconductors, insulators, superconductors and ferroelectrics. For a "long time", the magnetic order was absent in the large variety of two-dimensional (2D) systems. A few years ago, a new type of 2D materials with long-range magnetic or ...
14:00 - 15:00 Weekly Seminar
Uhlmann Phase, Black Hole Information and Holography
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 ent ...