Regensburg 2022 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 5: Frustrated Magnets – Spin Liquids
TT 5.4: Vortrag
Montag, 5. September 2022, 16:00–16:15, H10
Spinless fermions in a Z2 gauge theory on a triangular ladder — •Wolfram Brenig — Institute for Theoretical Physics, Technical University Braunschweig, D-38106 Braunschweig, Germany
A study of spinless matter fermions coupled to a constrained Z2 lattice gauge theory on a triangular ladder is presented. The triangular unit cell and the ladder geometry lead to a physics different from that on the square lattice. In the static case, even and odd gauge theories are identical. The gauge field dynamics is strongly influenced by the absence of periodic boundary conditions, rendering the deconfinement-confinement process a crossover in general and a quantum phase transition only for decorated electric coupling. At finite doping and in the static case, distinct flux phases can be identified versus magnetic energy. As for the square lattice, a single transition into a confined fermionic phase is found versus electric coupling, however dimer resonances in the confined phase are second order processes only. Global scans of the quantum phases in the intermediate coupling regime are provided.