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cond-mat.mes-hall2019★ 1 cited
Excited-State Quantum Phase Transitions in Bosonic Lattice Systems
Michal Macek
Concentrating on bosonic lattice systems, we ask whether and how Excited State Quantum Phase Transition (ESQPT) singularities occur in condensed matter systems with ground state QP…
cond-mat.mes-hall2019★ 1 cited
Van Hove Singularities and Excited-State Quantum Phase Transitions in Graphene-like Microwave Billiards
Michal Macek, Barbara Dietz
We discuss solutions of an algebraic model of the hexagonal lattice vibrations, which point out interesting localization properties of the eigenstates at van Hove singularities (vH…