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Monotones from multi-invariants: a classification
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In this paper we study local unitary invariants of a multi-partite quantum state that are monotonic, on average, under local operations and classical communication (locc). In particular we focus on local unitary invariants that are constructed out of polynomials in the state and its conjugate - called multi-invariants. Multi-invariants are labeled by certain types of graphs. Recently, in \cite{Gadde:2024jfi}, the authors related the condition of monotonicity under locc to a graph theoretic condition on the multi-invariant called edge-convexity. In this paper, we conjecture a complete classification of edge-convex multi-invariants. The conjecture states that the edge-convex multi-invariants are labeled by finite Coxeter groups. We prove this conjecture for all but six cases.
Forward citations
Cited by 2 Pith papers
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Fun with Graph States: Nonlocal Bell Pairs and the Arf Invariant
Graph-state inner products are governed by the F2-rank of the adjacency matrix and the Arf invariant, yielding a nonlocal Bell-pair factorization of the Hilbert space.
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Genuine multipartite entanglement of a gapped ground state is conjectured and, for Levin-Wen models, shown to reproduce the TQFT partition function on any 3-manifold.
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