18 citations · 52 across the 12 of their papers we have counts for
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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…
Order-by-disorder and long-range interactions in the antiferromagnetic transverse-field Ising model on the triangular lattice -- A perturbative point of view
J. A. Koziol, M. Mühlhauser, K. P. Schmidt
We study the low-field ground-state (GS) properties of the antiferromagnetic transverse-field Ising model with long-range interactions (afLRTFIM) on the triangular lattice. We use…