6 papers
Estimating the Fisher information from ARPES in general two-band models
Gunnar F Lange
The Quantum Fisher information is frequently studied in the fields of quantum sensing and quantum metrology, as it specifies the sensitivity of a sensor through the Crámer-Rao boun…
Optimally embedded tight binding for reproducing geometry dependent observables
Jonas J Telle, Gunnar F Lange
In tight-binding models, the position operator is reduced to intra-cell orbital positions (embeddings). While accurately reproducing band structures, such models often fail for geo…
Electrons on Helium and Entangled Quantum Sensors for Particle Physics
Maria Elena Perruzza, Niyaz R. Beysengulov, Stian D. Bilek +12
Quantum sensors that harness quantum coherence and entanglement are emerging as powerful tools in many fields, including particle physics, promising unprecedented sensitivity beyon…
Quantum geometric bounds in spinful systems with trivial band topology
Wojciech J. Jankowski, Robert-Jan Slager, Gunnar F. Lange
We derive quantum geometric bounds in spinful systems with spin topology characterized by a single index protected by a spin gap. Our bounds provide geometric conditio…
Photo-induced electronic and spin topological phase transitions in monolayer bismuth
Bo Peng, Gunnar F. Lange, Daniel Bennett +3
Ultrathin bismuth exhibits rich physics including strong spin-orbit coupling, ferroelectricity, nontrivial topology, and light-induced structural dynamics. We use \textit{ab initio…
Electrical transport signatures of metallic surface state formation in the strongly-correlated insulator FeSb2
Alexander G. Eaton, Nicholas J. M. Popiel, Ke-Jun Xu +8
We present local and nonlocal electrical transport measurements of the correlated insulator FeSb. By employing wiring configurations that delineate between bulk- and surface-do…