3 papers
quant-ph2026
Quantum Criticality from Spectral Collapse in the Two-Photon Rabi Model
Jiong Li, Jun-Ling Wang, Jun-ling Wang +2
Spectral collapse in the two-photon quantum Rabi model (tpQRM) has long been regarded as insufficient to establish quantum criticality because, under generic conditions, the lowest…
cond-mat.str-el2024
Low-lying excited states quantum entanglement and continuous quantum phase transitions: The criticality of a one-dimensional deconfined critical point
Yan-Chao Li, Yuan-Hang Zhou, Yuan Zhang +1
From the perspective of low-lying excited states, we study the deconfined quantum critical point (DQCP) in a one-dimensional quantum spin chain by means of the entanglement entropy…
quant-ph2024
Multipartite entanglement serves as a faithful detector for quantum phase transitions
Y. C. Li, Y. H. Zhou, Y. Zhang +2
We investigate quantum phase transitions in various spin chain systems using the multipartite entanglement measure based on the monogamy inequality of squared entanglemen…