53 citations · 105 across the 9 of their papers we have counts for
9 papers
Geometry Dependence of Error Thresholds in Two-Dimensional Toric Codes
D. Lessing, A. Langheld, C. Krämer +2
We investigate how the lattice geometry influences the error thresholds of two-dimensional toric codes. In the presence of bit- or phase-flip errors, the toric code maps onto the t…
Quantitative approach for the Dicke-Ising chain with an effective self-consistent matter Hamiltonian
J. Leibig, M. Hörmann, A. Langheld +2
In the thermodynamic limit, the Dicke-Ising chain maps exactly onto an effective self-consistent matter Hamiltonian with the photon field acting solely as a self-consistent effecti…
Comment on "Role of Matter Interactions in Superradiant Phenomena"
Max Hörmann, Anja Langheld, Jonas Leibig +2
Recently, Mendonça et al. [arXiv:2503.04961] investigated the Dicke-XXZ model and the Dicke-Ising model. For the latter model, their calculated quantum phase diagram contradicts cl…
Melting of devil's staircases in the long-range Dicke-Ising model
Jan Alexander Koziol, Anja Langheld, Kai Phillip Schmidt
We present quantum phase diagrams for the antiferromagnetic long-range Ising model with a linear coupling to a single bosonic mode on the square and triangular lattice. For zero co…
Quantum phase diagrams of Dicke-Ising models by a wormhole algorithm
Anja Langheld, Max Hörmann, Kai Phillip Schmidt
We gain quantitative insights on effects of light-matter interactions on correlated quantum matter by quantum Monte Carlo simulations. We introduce a wormhole algorithm for the par…
Quantum-critical properties of the one- and two-dimensional random transverse-field Ising model from large-scale quantum Monte Carlo simulations
C. Krämer, J. A. Koziol, A. Langheld +2
We study the ferromagnetic transverse-field Ising model with quenched disorder at in one and two dimensions by means of stochastic series expansion quantum Monte Carlo simu…
Monte Carlo based techniques for quantum magnets with long-range interactions
P. Adelhardt, J. A. Koziol, A. Langheld +1
Long-range interactions are relevant for a large variety of quantum systems in quantum optics and condensed matter physics. In particular, the control of quantum-optical platforms…
Scaling at quantum phase transitions above the upper critical dimension
A. Langheld, J. A. Koziol, P. Adelhardt +2
The hyperscaling relation and standard finite-size scaling (FSS) are known to break down above the upper critical dimension due to dangerous irrelevant variables. We establish a co…
Quantum-critical properties of the long-range transverse-field Ising model from quantum Monte Carlo simulations
J. Koziol, A. Langheld, S. C. Kapfer +1
The quantum-critical properties of the transverse-field Ising model with algebraically decaying interactions are investigated by means of stochastic series expansion quantum Monte…