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…
quant-ph2024
Entanglement Hamiltonian and effective temperature of non-Hermitian quantum spin ladders
Pei-Yun Yang, Yu-Chin Tzeng
Quantum entanglement plays a crucial role not only in understanding Hermitian many-body systems but also in offering valuable insights into non-Hermitian quantum systems. In this p…