Joint Quantum Seminar
Wednesday, October 30
4:00 PM, Jefferson 250
Angel Rubio, Max Planck Institute for the Structure and Dynamics of Matter; Center for
Computational Quantum Physics
“Quantum Cavities and Floquet Materials Engineering from First Principles QEDFT”
An appealing and challenging route towards engineering materials with specic properties is
to find ways of designing or selectively manipulate materials, especially at the quantum
level. We will 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 (vaccum) 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, e.g coupling to circularly polarized photons leads to
local breaking of time-reversal symmetry enabling the control over a large variety of
materials properties (e.g.topology). We show that the new quantum electrodynamics
density-functional formalism (QEDFT) can account for those effects. We illustrate the
realization of those ideas in molecular complexes and 2D materials.
4:00 pm: Ten Minute Talk by Pavel Dolgirev (Demler group)
4:15 pm: Refreshments
4:30 pm: Prof. Angel Rubio
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Clare Ploucha
Director of Programs
Harvard Quantum Initiative
17 Oxford Street, Jefferson 357
Cambridge, MA 02138
P: 617-495-3388
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