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arxiv: 0808.0938 · v2 · submitted 2008-08-07 · 🪐 quant-ph · cond-mat.str-el

Geometric Entanglement in a One-Dimensional Valence Bond Solid State

classification 🪐 quant-ph cond-mat.str-el
keywords entanglementgeometricanalyticalbondquantumsolidstatevalence
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In this paper we provide the analytical derivation of the global geometric entanglement per block for the valence bond solid ground state of the spin-1 AKLT chain. In particular, we show that this quantity saturates exponentially fast to a constant when the sizes of the blocks are sufficiently large. Our result provides the first known example of an analytical calculation of the geometric entanglement for a gapped quantum many-body system in one dimension and far away from a quantum critical point.

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