Polaritonic Quantum Materials from first principles

by Prof. Angel Rubio (CFEL / Max Planck Institute for the Structure and Dynamics of Matter)

Tuesday 6 Jul 2021, 13:00 → 14:00 Europe/Berlin

Zoom meeting

We provide an overview of how well-established concepts in the fields of quantum chemistry and materials have to be adapted when the quantum nature of light becomes important. We will pursue the question whether it is possible to create these new states of materials as groundstates of the system. To this end we will show how the emerging (vacuum) dressed states resembles Floquet states in driven systems. A particular appeal of light dressing is the possibility to engineer symmetry breaking which can lead to novel properties of materials. Strong light–matter coupling in cavities provides a pathway to break fundamental materials symmetries, like time-reversal symmetry in chiral cavities. We will discuss the potential to realize non-equilibrium states of matter that have so far been only accessible in ultrafast and ultrastrong laser-driven materials. We illustrate the realisation of those ideas in molecular complexes and 2D materials and show that the  combination of cavity-QED  and 2D twisted van der Waals heterostructures provides a novel and unique platform for the seamless realisation of a plethora of interacting quantum phenomena, including exotic and elusive correlated and topological phases of matter. We will briefly introduce our newly developed quantum electrodynamics density-functional formalism (QEDFT) as a first principles framework to predict, characterize and control the spontaneous appearance of ordered phases of strongly interacting light-matter hybrids.

Join Zoom Meeting
https://xfel.zoom.us/j/97594407775?pwd=amNlRXRGanIxRUpLaVkxdkdMWHplQT09

Meeting ID: 975 9440 7775
Passcode: 412594
One tap mobile
+496938079883,,97594407775# Germany
+496950502596,,97594407775# Germany

Dial by your location
        +49 69 3807 9883 Germany
        +49 695 050 2596 Germany
        +49 69 7104 9922 Germany
        +49 30 5679 5800 Germany
Meeting ID: 975 9440 7775
Find your local number: https://xfel.zoom.us/u/a9CyuVTJk

Join by Skype for Business
https://xfel.zoom.us/skype/97594407775

2021.07.06_EXSS_Angel_Rubio.pdf