Andreas Karch

activity

20242026

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Showing 2025 · hep-thShow all

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hep-th2025

Dissipation in Open Holography

Andreas Karch, Merna Youssef

We exploit the holographic realization of a conformal theory coupled to an external bath realized via a double trace deformation and its gravity dual in terms of transparent bounda…

hep-th2025

Nonrenormalization Theorem for $N = (4, 4)$ Interface Entropy

Andreas Karch, Hirosi Ooguri, Mianqi Wang

We derive a formula for the half-BPS interface entropy between any pair of $N = (4, 4)$ theories on the same conformal manifold. This generalizes the diastasis formula derived…

Dissipation in Open Holography

Nonrenormalization Theorem for N=(4,4) Interface Entropy

Nonrenormalization Theorem for $N = (4, 4)$ Interface Entropy