Quantum 2025 – wissenschaftliches Programm

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THU: Thursday Contributed Sessions

THU 9: Correlated Quantum Matter: Contributed Session to Symposium II

THU 9.6: Vortrag

Donnerstag, 11. September 2025, 15:30–15:45, ZHG101

Few-electron states in molecular networks bonded to metals — •Max Best and Carsten Henkel — Universität Potsdam, Institut für Physik und Astronomie, Germany

A simple tight-binding model for electrons in an organic molecule (``network'') is studied to provide some understanding on electron transport beyond the single-particle picture. Many-fermion states are properly anti-symmetrised without using Slater determinants explicitly. The geometric symmetry group of the network (e.g., hexagonal ring) is implemented carefully on the N-electron subspaces. We discuss the influence of the Coulomb interaction on the electron-hole symmetry, the assignment of degeneracies to irreducible representations of the symmetry group, and the splitting of these under a magnetic field. Hydrodynamic models for a metallic surface including exchange and von-Weizsäcker kinetic energy are developed as a tribute to 100 years of quantum physics and applied to current problems in plasmonic catalysis.

Keywords: many-fermion states; discrete symmetries; transport into fermionic bath