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Constraining braneworlds with entanglement entropy

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arxiv 2306.15672 v2 pith:5P737HWG submitted 2023-06-27 hep-th gr-qchep-ph

Constraining braneworlds with entanglement entropy

classification hep-th gr-qchep-ph
keywords braneworldsentanglementcriteriaentropiesholographictheoriesactioncalculations
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We propose swampland criteria for braneworlds viewed as effective field theories of defects coupled to semiclassical gravity. We do this by exploiting their holographic interpretation. We focus on general features of entanglement entropies and their holographic calculations. Entropies have to be positive. Furthermore, causality imposes certain constraints on the surfaces that are used holographically to compute them, most notably a property known as causal wedge inclusion. As a test case, we explicitly constrain the Dvali--Gabadadze--Porrati term as a second-order-in-derivatives correction to the Randall--Sundrum action. We conclude by discussing the implications of these criteria for the question on whether entanglement islands in theories with massless gravitons are possible in Karch--Randall braneworlds.

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Cited by 3 Pith papers

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