SFB 1238 | May 21, 14:30
Quantum Science of Correlated Light and Matter
The collective behaviour of matter as well as its interplay with light is one of the most important topics of modern science. Understanding it is crucial in basic research, as it holds the key to a variety of correlated quantum many-body phenomena like spin liquids or superconductvity. At the same time, this understanding forms the basis for many (quantum) technological applications which define the modern era. In this talk I mainly concentrate on light-matter systems, where strong matter-matter and strong light-matter interactions are present simultaneously. From a condensed matter perspective, one might expect to tune the properties of quantum materials by quantum light and from a quantum optics perspective one might engineer interesting novel facets of quantum light originating from such entangled light-matter systems. The main focus is to investigate the quantum properties of such correlated light-matter systems and the physical consequences of the induced long-range interactions. Specifically, I will discuss the pysical properties of the paradigmatic Dicke-Ising model being the sum of a matter-matter Ising interaction and a quantum Rabi (Dicke) Hamiltonian on unfrustrated and frustrated geometries as well as extensions to algebraically decaying long-range interactions. Finally, I will further shortly discuss topologically ordered systems by introducing a novel XY toric code which is exactly solvable and displays topological and fractonic phases in two dimensions simultaneously.
FAU Erlangen
PH2
Contact: Simon Trebst