Achim Rosch and Simon Trebst

Tue 12:00-13:30

seminar room | Institute for Theoretical Physics (container building)

The seminar will start on

**Tue April 8th, 2014**.

# Overview

The classification of knots is a central aspect of topology — the mathematical discipline which investigates those properties of a system that remain unchanged when one tries to deform it continuously, such as the number of knots in a rope. In physics, the topological properties of the quantum mechanical wave function of a many-particle system turn out to be the essential ingredients to some of the most fascinating phenomena in solid state physics.

The seminar will give an introduction to topological defects and their deep relation to quantum mechanics. We will discuss how the concept of Berry phases can be used to characterize the different forms of topological defects and provide an overview of experimentally observed manifestations of topological defects in quantum matter.

# Prerequisites

For some talks previous knowledge in Quantum Field Theory is useful, but several topics can also be covered with a basic background in quantum mechanics.

# Talks

- May 6th,
**Alessandro Fasse**/ Christoph Schütte

*Topological defects* - May 13th,
**Prabhakara Kiran Horabail**/ Robert Bamler

*Berry phases* - May 20th,
**Patrick Wong**and**Poulami Somanya Ganguly**/ Jonathan Lux

*Topological phase transitions and gauge theories* - May 27th,
**Sibin Yang**and**Zihao Gao**/ Maria Hermanns

*The integer quantum Hall effect*

- June 3rd,
**Venkata Krishna Bharadwaj**/ Maria Hermanns

*The fractional quantum Hall effect*

- June 17th,
**Charles Guggenheim**/ Maria Hermanns

*Skyrmions in quantum Hall liquids*

- June 24th,
**Wilfried Michel**/ Johannes Waizner

*Skyrmions in chiral metals*

- July 1st,
**Stephanie Matern**and**Fei Chen**/ Max Genske

*The Kitaev chain: theoretical model and experiments*

- July 8th,
**Peter Gerliz**and**Christopher Bartel**/ Michael Becker

*The Kitaev honeycomb model*

- July 15th,
**Finn Lasse Büssen**/ Max Gerlach

*Magnetic monopoles in spin ice*