Entanglement entropy saturates to finite constants set by virtual bond structure in fully and partially dimerized phases of frustrated spin chains, showing multiple values and multi-band features in the partially dimerized case.
Kumar, Quantum spin models with exact dimer ground states, Physical Review B66, 024406 (2002)
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Entanglement signature of fully and partially dimerized phases in frustrated spin chains
Entanglement entropy saturates to finite constants set by virtual bond structure in fully and partially dimerized phases of frustrated spin chains, showing multiple values and multi-band features in the partially dimerized case.