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arxiv: 1906.05146 · v2 · pith:MMW35T3Onew · submitted 2019-06-12 · 🪐 quant-ph · cond-mat.str-el

Entanglement as geometry and flow

classification 🪐 quant-ph cond-mat.str-el
keywords entanglementmatrixadjacencycasescurrentgeneralizedgeometryapproximation
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We explore the connection between the area law for entanglement and geometry by representing the entanglement entropies corresponding to all $2^N$ bipartitions of an $N$-party pure quantum system by means of a (generalized) adjacency matrix. In the cases where the representation is exact, the elements of that matrix coincide with the mutual information between pairs of sites. In others, it provides a very good approximation, and in all the cases it yields a natural {\em entanglement contour} which is similar to previous proposals.Moreover, for one-dimensional conformal invariant systems, the generalized adjacency matrix is given by the two-point correlator of an {\em entanglement current} operator. We conjecture how this entanglement current may give rise to a metric entirely built from entanglement.

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