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Formulas for Partial Entanglement Entropy

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arxiv 1910.10978 v4 pith:CQ26AJZN submitted 2019-10-24 hep-th cond-mat.stat-mechgr-qcquant-ph

classification hep-thcond-mat.stat-mechgr-qcquant-ph
keywords mathcalentanglemententropypartialphysicalproposalrequirementsfind
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abstract

The partial entanglement entropy (PEE) $s_{\mathcal{A}}(\mathcal{A}_i)$ characterizes how much the subset $\mathcal{A}_i$ of $\mathcal{A}$ contribute to the entanglement entropy $S_{\mathcal{A}}$. We find one additional physical requirement for $s_{\mathcal{A}}(\mathcal{A}_i)$, which is the invariance under a permutation. The partial entanglement entropy proposal satisfies all the physical requirements. We show that for Poincar\'e invariant theories the physical requirements are enough to uniquely determine the PEE (or the entanglement contour) to satisfy a general formula. This is the first time we find the PEE can be uniquely determined. Since the solution of the requirements is unique and the \textit{PEE proposal} is a solution, the \textit{PEE proposal} is justified for Poincar\'e invariant theories.

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Cited by 3 Pith papers

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