Semi-Synthetic Topological Quantum Matter
January 26th, 2018 TOBIAS GRASS Joint Quantum Institute
University of Maryland

Two-dimensional materials can easily be accessed by light, and light-matter interactions provide powerful tools for controlling their electronic behavior. In the first part of my talk, I will consider optical driving as a tool for engineering topological electronic ground states. Concretely, I will show that a graphene system in the quantum Hall regime experiences topological phase transitions from Abelian to non-Abelian phases when light couples to a Landau level transition. The optical coupling introduces a new bilayer-like degree of freedom, and in this sense, the scenario resembles a quantum simulator of artificial dimensions. The second part of the talk studies light as a flexible tool to excite topological matter. Light with orbital angular momentum provides a flux pump, and optical potentials can be used to move individual quasiholes.

Seminar, January 26, 2018, 15:00. ICFO’s Seminar Room.

Hosted by Prof. Maciej Lewenstein