Related papers: Multi-entropy in heavy local quenches

Multi-entropy in heavy local quenches

URL: http://arxiv.org/abs/2606.12526v1
Date: Wed, 10 Jun 2026 18:00:02 GMT
Title: Multi-entropy in heavy local quenches
Abstract summary: We study the time evolution of tripartite entanglement in heavy local quenches in two-dimensional holographic conformal field theories.<n>A perturbative bulk analysis shows that the first-order small-mass perturbation around the vacuum geodesic network cancels identically at any time after the quench.
Score: 0.0
License: http://creativecommons.org/licenses/by/4.0/
Abstract: We study the time evolution of tripartite entanglement in heavy local quenches in two-dimensional holographic conformal field theories. Our diagnostic is the genuine multi-entropy of adjacent intervals, computed from both bulk and boundary perspectives. A perturbative bulk analysis shows that the first-order small-mass perturbation around the vacuum geodesic network cancels identically at any time after the quench. In the fully back-reacted geometry, a vacuum-subtracted genuine multi-entropy arises from a mismatch between the winding selected by the trivalent geodesic network and the windings selected independently by the pairwise geodesics. In the sharp quench limit, the time dependence of genuine multi-entropy is kinematically fixed to logarithms of rational functions of time and is independent of the heavy operator dimension. The CFT calculation reproduces the same formula within the heavy-light vacuum block approximation, where the branch choice in the heavy-background uniformization map corresponds to the winding selection in the bulk. These results indicate that, in this setup, the genuine multi-entropy is controlled by global saddle selection, rather than by a local energy response or quasiparticle propagation.

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