Phase Transitions in Quantum Many-Body Scars
arXiv:2405.20113 · doi:10.1103/PhysRevResearch.6.L042007
Abstract
We propose a type of phase transition in quantum many-body systems, which occurs in highly excited quantum many-body scar states, while most of the spectrum is largely unaffected. Such scar state phase transitions can be realized by embedding a matrix product state, known to undergo a phase transition, as a scar state into the thermal spectrum of a parent Hamiltonian. We find numerically that the mechanism for the scar state phase transition involves the formation or presence of low-entropy states at energies similar to the scar state in the vicinity of the phase transition point.
6 pages, 3 figures, v2: accepted version
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