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quant-ph2026
Quantum criticality from spectral collapse in the two-photon Rabi model
Jiong Li, Jun-ling Wang, Qing-Hu Chen +1
Spectral collapse in the two-photon quantum Rabi model (tpQRM) has long been regarded as incompatible with quantum criticality due to the absence of a vanishing excitation gap. We…
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…