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O: Fachverband Oberflächenphysik

O 59: Mini-Symposium: Coherent band structure engineering with light I

O 59.3: Hauptvortrag

Mittwoch, 3. März 2021, 11:15–11:45, R2

Engineering emergent states in quantum materials with classical and quantum light — •Michael Sentef — Max Planck Institute for the Structure and Dynamics of Matter, Hamburg

Light-matter coupling enables the coherent manipulation of quantum states. For classical light, this is known as Floquet engineering, with potential applications ranging from engineered photon-photon interactions in Rydberg gases to Floquet topological states in a variety of platforms. In the limit of quantum light, quantum-electrodynamical cavities could enable the creation of polaritonic light-matter hybrid states, again ranging across platforms, from polaritonic chemistry with molecules to cavity superconductivity in quantum materials.

In this talk, I will discuss the status of our understanding of light-matter engineering of emergent states in quantum materials. I will show examples for the manipulation of fundamental interactions (Hubbard U) and their potential role in experiments on light-induced superconductivity [1,2] and dynamical phase transitions [3,4] driven by classical light, and discuss the quantum-to-classical crossover of Floquet engineering of the spin-exchange interaction [5].

[1] Buzzi et al., Phys. Rev. X 10, 031028 (2020). [2] Tindall et al., Phys. Rev. Lett. 125, 137001 (2020). [3] Tancogne-Dejean et al., Phys. Rev. Lett. 121, 097402 (2018). [4] Beaulieu et al., arXiv:2003.04059. [5] Sentef et al., Phys. Rev. Research 2, 033033 (2020).