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Boundary terms, branes and AdS/BCFT in first-order gravity

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arxiv 2401.16306 v2 pith:TM55S5RB submitted 2024-01-29 hep-th

classification hep-th
keywords gravityboundarytermsbcftbranesend-of-the-worldfirst-orderspacetime
verification ladder T0 review T1 audit T2 compute T3 formal
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We provide an account of the issue of Gibbons-Hawking-York-like boundary terms for a gravity theory defined on a Riemman-Cartan spacetime. We further discuss different criteria for introducing boundary terms in some familiar first-order gravity theories with both on-shell vanishing and non-vanishing torsion, along with considerations regarding the thermodynamics of black holes and profiles of the End-of-the-World branes. Our analysis confirms the expected geodesic profile of the End-of-the-World brane in the BF formulation of Jackiw-Teitelboim gravity. Finally, we present the first realisation of the AdS/BCFT duality for spacetime with torsion.

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  1. The role of torsion in holographic conductivity

    hep-th 2025-01 conditional novelty 6.0 of 10

    Holographic conductivity computed in a torsionful Riemann-Cartan bulk shows a Drude peak and metal-insulator crossover when the photon couples non-minimally to torsion, with σ_DC = √μ + 3γ²δ²/√μ.

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