Bremen 2017 – scientific programme

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MP: Fachverband Theoretische und Mathematische Grundlagen der Physik

MP 2: Quantum Information and Thermodynamics

MP 2.1: Invited Talk

Monday, March 13, 2017, 14:00–14:45, SFG 2010

Entanglement in topologically ordered systems: A quantum information perspective — •Norbert Schuch — Max-Planck-Institut für Quantenoptik, 85748 Garching, Germany

Topologically ordered systems exhibit a rich variety of unconventional phenomena, such as protected edge physics or excitations with exotic statistics, which are rooted in the complex global entanglement present in these systems. In my talk, I will show how quantum information concepts allow us to construct a succinct description of these systems which explicitly reveals the structure of their entanglement, termed Tensor Network States. I will illustrate the power of this description by two examples: First, I will show how it allows to construct an explicit and general holographic duality relating the entanglement properties of the bulk to the boundary physics of a system, and second, I will demonstrate its power in identifying topological spin liquids, elusive systems which do not order magnetically despite strong interactions yet exhibit global topological order.