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Excited-state quantum phase transitions and chaos in a three-level Lipkin model

Mayorgas, Alberto et al.
arXiv (All) · Papers
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mathematical-physicsquantum-physics
Excited-state quantum phase transitions (ESQPTs) have been extensively studied in two-level models, but their characterization remains challenging in systems displaying mixed regular and chaotic dynamics. In this work, we investigate ESQPTs within the three-level Lipkin-Meshkov-Glick model, where an
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