Berlin 2018 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 91: Correlated Electrons: Method Development

TT 91.11: Vortrag

Donnerstag, 15. März 2018, 17:45–18:00, H 0104

Hybrid quantum Monte Carlo simulations of the two dimensional half-filled Su-Schrieffer-Heeger (SSH) model — •Stefan Beyl, Martin Hohenadler, Florian Goth, and Fakher F. Assaad — Institut für Theoretische Physik und Astrophysik, Universität Würzburg, Deutschland

The Su-Schrieffer-Heeger (SSH) model describes electrons interacting with quantum phonons via a bond coupling. While the model is understood in detail in one dimension, no systematic results are available in two dimensions. Here, we use the Hybrid Quantum Monte Carlo (HQMC) method to simulate the model on the square lattice without a sign problem. We determine the phase diagram and discuss the advantages and challenges of HQMC in the context of electron-phonon systems.