K. P. Schmidt

activity

20242026

collaborators

4 papers

cond-mat.str-el2026

Unconventional $Z_{2} \times Z_{2} \times Z_{2}$ topological order in the kagome XY toric code

C. KÃ¶lbl, M. Vieweg, K. P. Schmidt

We investigate the quantum phase diagram of the XY toric code (XYTC) on the kagome lattice consisting of $X Y$ hexagonal and triangular plaquette operators and conserved star operat…

cond-mat.str-el2025

Symmetry breaking and competing valence bond states in the star lattice Heisenberg antiferromagnet

Pratyay Ghosh, Jan Koziol, Samuel Nyckees +2

We investigate the ground state phase diagram of the spin- $1/2$ antiferromagnetic Heisenberg model on the star lattice using infinite projected entangled pair states (iPEPS) and hi…

cond-mat.str-el2025

Absence of topological order in the $U (1)$ checkerboard toric code

M. Vieweg, V. Kott, L. Lenke +2

We investigate the $U (1)$ checkerboard toric code which corresponds to the $U (1)$ -symmetry enriched toric code with two distinct star sublattices. One can therefore tune from the l…

cond-mat.str-el2024

Fracton and topological order in the XY checkerboard toric code

M. Vieweg, K. P. Schmidt

We introduce the XY checkerboard toric code. It represents a generalization of the $Z_{2}$ toric code with two types of star operators with $x$ and $y$ flavor and two anisot…

Unconventional Z2​×Z2​×Z2​ topological order in the kagome XY toric code

Symmetry breaking and competing valence bond states in the star lattice Heisenberg antiferromagnet

Absence of topological order in the U(1) checkerboard toric code

Fracton and topological order in the XY checkerboard toric code

Unconventional $Z_{2} \times Z_{2} \times Z_{2}$ topological order in the kagome XY toric code

Absence of topological order in the $U (1)$ checkerboard toric code