A generalized coherent-state framework computes many-body density of states in irreducible sectors, supplies rigorous ground-state energy bounds, and identifies quantum and excited-state phase transitions in the LMG model and long-range Ising chains.
Perelomov,Generealized Coherent States and Their Applications, Texts and Monographs in Physics (Springer Berlin, Heidelberg, 1986)
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A Generalized Coherent State Framework for Many-Body Density of States
A generalized coherent-state framework computes many-body density of states in irreducible sectors, supplies rigorous ground-state energy bounds, and identifies quantum and excited-state phase transitions in the LMG model and long-range Ising chains.