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.
Under PBC the N/2-odd sub-series attains S∞ = 2 ln 2 exactly for all accessible N (no fit needed), while the N/2-even sub-series converges from below
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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.