From the 1 of 3 linked papers with an AI index.
3 papers
cond-mat.str-el2026
Dissociation of bulk and entanglement phase transitions in the Haldane phase
Yu-Chin Tzeng, Gunnar Möller
The paper reexamines the momentum‑resolved entanglement spectrum of a spin‑½ XXZ ladder in the Haldane phase, finding two distinct modes and showing that the entanglement phase tra…
quant-ph2026
Fidelity and quantum geometry approach to Dirac exceptional points in diamond nitrogen-vacancy centers
Chia-Yi Ju, Gunnar Möller, Yu-Chin Tzeng
Dirac exceptional points (EPs) represent a novel class of non-Hermitian singularities that, unlike conventional EPs, reside entirely within the parity-time unbroken phase and exhib…
cond-mat.str-el2025
Fitness landscape for quantum state tomography from neutron scattering
Tymoteusz Tula, Jorge Quintanilla, Gunnar Möller
Recently, a direct connection between static structure factors and quantum ground states for two-spin interaction Hamiltonians was proven. This suggests the possibility of quantum…