32 citations · 95 across the 9 of their papers we have counts for
9 papers
Quantum decay of magnons in the unfrustrated honeycomb Heisenberg model
Calvin Krämer, Dag-Björn Hering, Vanessa Sulaiman +3
We investigate the physical properties of elementary magnon excitations of the ordered antiferromagnetic Heisenberg model on the honeycomb lattice using quantum Monte Carlo (QMC) s…
Quantum effects in the magnon spectrum of 2D altermagnets via continuous similarity transformations
Raymond Wiedmann, Dag-Björn Hering, Vanessa Sulaiman +3
We investigate quantum effects on magnon excitations in a minimal spin-1/2 Heisenberg model for 2D altermagnets on the square lattice. A continuous similarity transformation is app…
Quantum melting of long-range ordered quantum antiferromagnets investigated by momentum-space continuous similarity transformations
Dag-Björn Hering, Matthias R. Walther, Kai P. Schmidt +1
We apply continuous similarity transformations (CSTs) to study the zero-temperature breakdown of long-range ordered quantum antiferromagnets. The CST flow equations are truncated i…
Quantitative description of long-range order in the anisotropic spin-1/2 Heisenberg antiferromagnet on the square lattice
Nils Caci, Dag-Björn Hering, Matthias R. Walther +3
The quantitative description of long-range order remains a challenge in quantum many-body physics. We provide zero-temperature results from two complementary methods for the ground…
Extracting quantum-critical properties from directly evaluated enhanced perturbative continuous unitary transformations
L. Schamriß, M. R. Walther, K. P. Schmidt
Directly evaluated enhanced perturbative continuous unitary transformations (deepCUTs) are used to calculate non-perturbatively extrapolated numerical data for the ground-state ene…
Continuous similarity transformation for critical phenomena: easy-axis antiferromagnetic XXZ model
Matthias R. Walther, Dag-Björn Hering, Götz S. Uhrig +1
We apply continuous similarity transformations (CSTs) to the easy-axis antiferromagnetic XXZ-model on the square lattice. The CST flow equations are truncated in momentum space by…
Competing topological orders in three dimensions: X-cube versus toric code
M. Mühlhauser, K. P. Schmidt, J. Vidal +1
We study the competition between two different topological orders in three dimensions by considering the X-cube model and the three-dimensional toric code. The corresponding Hamilt…
Quantum critical phase transition between two topologically-ordered phases in the Ising toric code bilayer
R. Wiedmann, L. Lenke, M. R. Walther +2
We demonstrate that two toric code layers on the square lattice coupled by an Ising interaction display two distinct phases with intrinsic topological order. The second-order quant…
Quantum robustness of fracton phases
M. Mühlhauser, M. R. Walther, D. A. Reiss +1
The quantum robustness of fracton phases is investigated by studying the influence of quantum fluctuations on the X-Cube model and Haah's code, which realize a type-I and type-II f…