109 citations · 834 across the 25 of their papers we have counts for
14 papers · 1 filter
Field-induced quasi-bound state within the two-magnon continuum of a square-lattice Heisenberg antiferromagnet
F. Elson, M. Nayak, A. A. Eberharter +14
Quantum magnets in two dimensions display strong quantum interaction effects even when magnetically ordered. Using the metal-organic framework material CuF(DO)(pyz), we…
Emergent conformal boundaries from finite-entanglement scaling in matrix product states
Rui-Zhen Huang, Long Zhang, Andreas M. Läuchli +3
The use of finite entanglement scaling with matrix product states (MPS) has become a crucial tool for studying 1+1d critical lattice theories, especially those with emergent confor…
Extracting the Speed of Light from Matrix Product States
Alexander A. Eberharter, Laurens Vanderstraeten, Frank Verstraete +1
We provide evidence that the spectrum of the local effective Hamiltonian and the transfer operator in infinite-system matrix product state simulations are identical up to a global…
Comment on "The role of electron-electron interactions in two-dimensional Dirac fermions''
Stephan Hesselmann, Thomas C. Lang, Michael Schuler +2
Tang et al. [Science 361, 570 (2018)] report on the properties of Dirac fermions with both on-site and Coulomb interactions. The substantial decrease up to ~40% of the Fermi veloci…
Sublattice Coding Algorithm and Distributed Memory Parallelization for Large-Scale Exact Diagonalizations of Quantum Many-Body Systems
Alexander Wietek, Andreas M. Läuchli
We present algorithmic improvements for fast and memory-efficient use of discrete spatial symmetries in Exact Diagonalization computations of quantum many-body systems. These techn…
Finite Correlation Length Scaling in Lorentz-Invariant Gapless iPEPS Wave Functions
Michael Rader, Andreas M. Läuchli
It is an open question how well tensor network states in the form of an infinite projected entangled pair states (iPEPS) tensor network can approximate gapless quantum states of ma…
Unified Phase Diagram of Antiferromagnetic SU(N) Spin Ladders
Andreas Weichselbaum, Sylvain Capponi, Philippe Lecheminant +2
Motivated by near-term experiments with ultracold alkaline-earth atoms confined to optical lattices, we establish numerically and analytically the phase diagram of two-leg SU()…
An entropy perspective on the thermal crossover in a fermionic Hubbard chain
Lars Bonnes, Hannes Pichler, Andreas M. Läuchli
We study the Renyi entropy in the finite temperature crossover regime of a Hubbard chain using quantum Monte Carlo. The ground state entropy has characteristic features such as a l…
Competing states in the SU(3) Heisenberg model on the honeycomb lattice: Plaquette valence-bond crystal versus dimerized color-ordered state
Philippe Corboz, Miklós Lajkó, Karlo Penc +2
Conflicting predictions have been made for the ground state of the SU(3) Heisenberg model on the honeycomb lattice: Tensor network simulations found a plaquette order [Zhao et al,…
Heisenberg antiferromagnet on Cayley trees: low-energy spectrum and even/odd site imbalance
Hitesh J. Changlani, Shivam Ghosh, Christopher L. Henley +1
To understand the role of local sublattice imbalance in low-energy spectra of s=1/2 quantum antiferromagnets, we study the s=1/2 quantum nearest neighbor Heisenberg antiferromagnet…
Three-sublattice order in the SU(3) Heisenberg model on the square and triangular lattice
Bela Bauer, Philippe Corboz, Andreas M. Läuchli +4
We present a numerical study of the SU(3) Heisenberg model of three-flavor fermions on the triangular and square lattice by means of the density-matrix renormalization group (DMRG)…
Phase diagram and continuous pair-unbinding transition of the bilinear-biquadratic S=1 Heisenberg chain in a magnetic field
Salvatore R. Manmana, Andreas M. Läuchli, Fabian H. L. Essler +1
We investigate the properties of the Heisenberg S=1 chain with bilinear and biquadratic interactions in a magnetic field using the Density Matrix Renormalization Group, Bethe ansat…
Dzyaloshinskii-Moriya anisotropy and non-magnetic impurities in the kagome system ZnCu_3(OH)_6Cl_2
Ioannis Rousochatzakis, Salvatore R. Manmana, Andreas M. Läuchli +2
Motivated by recent nuclear magnetic resonance experiments on ZnCu(OH)Cl, we present an exact-diagonalization study of the combined effects of non-magnetic impurities a…
Field-Controlled Magnetic Order in the Quantum Spin-Ladder System (Hpip)2CuBr4
B. Thielemann, Ch. Rüegg, K. Kiefer +18
Neutron diffraction is used to investigate the field-induced, antiferromagnetically ordered state in the two-leg spin-ladder material (Hpip)2CuBr4. This "classical" phase, a conseq…