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- W4387376427 abstract "Defects in frustrated antiferromagnetic spin chains are universally present in geometrically frustrated systems. We consider the defects of the one-dimensional, spin-$s$ XXZ chain with single-ion anisotropy on a periodic chain with $N$ sites that was famously studied by Haldane. For $N$ odd, the antiferromagnetic model is frustrated, and the ground state must include a soliton defect. We consider the Heisenberg interaction perturbatively and determine the corresponding perturbative solitonic ground state. Then we compute the entanglement spectrum, entanglement entropy (EE), capacity of entanglement (CE), and spin correlations in the solitonic ground state. For weak frustration, we find an algebraic violation of the area law for the EE consistent with recent results on weakly frustrated chains. Our analysis then moves beyond the weak frustration regime, and we obtain a novel extensive scaling law for the EE when strong frustration prevails, signaling large entanglement, and failure of the quasiparticle interpretation in this regime. Enhanced frustration results in less total correlations but relatively more nonlocal correlations." @default.
- W4387376427 created "2023-10-06" @default.
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- W4387376427 date "2023-10-05" @default.
- W4387376427 modified "2023-10-16" @default.
- W4387376427 title "Frustration, solitons, and entanglement in spin chains" @default.
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- W4387376427 doi "https://doi.org/10.1103/physrevb.108.155107" @default.
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