40 citations · 128 across the 17 of their papers we have counts for
18 papers
Thermodynamic-limit dispersion relations on trapped-ion quantum hardware
Lucas Marti, Sumeet, Stefan Wolf +2
We run a numerical linked-cluster expansion with a quantum algorithm (NLCE+QA), computing ground-state energies and one quasi-particle dispersions in the thermodynamic limit using…
Unconventional entanglement scaling and quantum criticality in the long-range spin-one Heisenberg chain with single-ion anisotropy
Patrick Adelhardt, Sean R. Muleady, Kai P. Schmidt +1
Long-range interactions can fundamentally reshape the low-energy properties of low-dimensional quantum matter, altering both continuous symmetry breaking and topological phenomena.…
Dicke superradiance in degenerate quantum matter: interplay of exchange statistics and spatial confinement
Julian Lyne, Kai Phillip Schmidt, Claudiu Genes +1
Collective radiance effects in quantum degenerate systems, such as superradiance and subradiance of a partially inverted ensemble, are shaped by the interplay of spatial confinemen…
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…
Quantum annealing for lattice models with competing long-range interactions
Jan Alexander Koziol, Kai Phillip Schmidt
We use superconducting qubit quantum annealing devices to determine the ground state of Ising models with algebraically decaying competing long-range interactions in the thermodyna…
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 Diagram of the Bilayer Kitaev-Heisenberg Model
Elahe Samimi, Antonia Duft, Patrick Adelhardt +2
We study the ground-state phase diagram of the spin- Kitaev-Heisenberg model on the bilayer honeycomb lattice with large-scale tensor network calculations based on the infinit…
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 and dynamical properties of the XXZ bilayer with long-range interactions
Patrick Adelhardt, Antonia Duft, Kai Phillip Schmidt
We study the XXZ square lattice bilayer model with antiferromagnetic non-frustrating long-range interactions that decay as a power law with the distance. Employing large-scale high…
Observation of Unprecedented Fractional Magnetization Plateaus in a New Shastry-Sutherland Ising Compound
Lalit Yadav, Afonso Rufino, Rabindranath Bag +10
Geometrically frustrated magnetic systems, such as those based on the Shastry-Sutherland lattice (SSL), offer a rich playground for exploring unconventional magnetic states. The de…
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…
Engineering Photon-mediated Long-Range Spin Interactions in Mott Insulators
Paul Fadler, Jiajun Li, Kai Phillip Schmidt +1
We investigate the potential to induce long-range spin interactions in a Mott insulator via the quantum electromagnetic field of a cavity. The coupling between light and spins is i…
Phase synchronization in dissipative non-Hermitian coupled quantum systems
J. Rohn, K. P. Schmidt, C. Genes
We study the interplay between non-Hermitian dynamics and phase synchronization in a system of bosonic modes coupled to an auxiliary mode. The linearity of the evolut…
Pressure dependence of the magnetization plateaus of SrCu_2(BO_3)_2
D. A. Schneider, K. Coester, F. Mila +1
We show that the critical fields of the magnetization plateaus of the Shastry-Sutherland model decrease significantly upon increasing the ratio of inter- to intra-dimer coupling, a…
Optimizing linked cluster expansions by white graphs
K. Coester, K. P. Schmidt
We introduce a white graph expansion for the method of perturbative continuous unitary transformations when implemented as a linked cluster expansion. The essential idea behind an…
Quantum disorder and local modes of the fully-frustrated transverse field Ising model on a diamond chain
K. Coester, W. Malitz, S. Fey +1
We investigate the transverse field Ising model on a diamond chain using series expansions about the high-field limit and exact diagonalizations. For the unfrustrated case we accur…
Disorder by disorder and flat bands in the kagome transverse field Ising model
M. Powalski, K. Coester, R. Moessner +1
We study the transverse field Ising model on a kagome and a triangular lattice using high-order series expansions about the high-field limit. For the triangular lattice our results…