Entanglement structure of complex quantum systems

25 04/2016

Monday, 25 Apr. 2016, 17:30 - 18:30

Presenter: Norbert Schuch
Host: Frank Verstraete
Where: HS 7 Schütte-Lihotzky, Karlsplatz 13, Vienna

Complex quantum systems exhibit a variety of unconventional phenomena,

such as protected quantized edge currents or excitations with non-trivial

statistics.  These phenomena are rooted in the complex global entanglement

structure present in those systems, referred to as topological order.  In

this talk, I will explain how one can model the physics of such systems

based on their entanglement structure in a way which allows to reconcile a

local description with global entanglement, and to understand the

emergence of global order from local properties. In particular, I will

discuss how the local symmetry structure of the system can give rise to

global topological order, and the way in which this order shows up in the

edge physics and the entanglement properties of the system.