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Entanglement Entropy for Relevant and Geometric Perturbations

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arxiv 1410.6530 v2 pith:V7VXLPDR submitted 2014-10-24 hep-th cond-mat.stat-mechgr-qcquant-ph

Entanglement Entropy for Relevant and Geometric Perturbations

classification hep-th cond-mat.stat-mechgr-qcquant-ph
keywords entanglemententropygeometricorderrelevantsecondcalculatedcontinue
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We continue the study of entanglement entropy for a QFT through a perturbative expansion of the path integral definition of the reduced density matrix. The universal entanglement entropy for a CFT perturbed by a relevant operator is calculated to second order in the coupling. We also explore the geometric dependence of entanglement entropy for a deformed planar entangling surface, finding surprises at second order.

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Cited by 3 Pith papers

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    Strip entanglement anisotropy S⊥−S∥ classifies dark portals in HSV p-wave superfluids into rigid rescalings versus width-running kinetic deformations with short-width W² decoupling.

  3. Holographic Entanglement Anisotropy as a Dark Deformation RG Probe in Hyperscaling-Violating $p$-Wave Superfluids

    hep-th 2026-06 unverdicted novelty 4.0

    Dark-scalar portals in holographic anisotropic superfluids yield negative strip susceptibility at vanishing strength in D=4,5 backgrounds, interpreted as UV decoupling of the portal.