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hep-th2026

Null fluid/gravity correspondence

Jay Armas, Emil Have, Gianbattista-Piero Nicosia

We construct a new class of perturbative asymptotically Anti-de Sitter pp-wave spacetimes by performing a long-wavelength expansion of Kaigorodov metrics in arbitrary spacetime dim…

hep-th2026

Conformal Defects in Neural Network Field Theories

Pietro Capuozzo, Brandon Robinson, Benjamin Suzzoni

Neural Network Field Theories (NN-FTs) represent a novel construction of arbitrary field theories, including those of conformal fields, through the specification of the network arc…

hep-th2025★ 1 cited

Heterotic Black Holes in Duality-Invariant Formalism

Upamanyu Moitra

We consider the effective theory of heterotic strings in two spacetime dimensions, in a double field theory-inspired formalism, manifestly consistent with -duality in string the…

hep-th2025★ 1 cited

Limits on the Statistical Description of Charged de Sitter Black Holes

Lars Aalsma, Puxin Lin, Jan Pieter van der Schaar +2

The thermodynamics of de Sitter black holes is complicated by the presence of two horizons and the absence of a globally defined timelike Killing vector. The standard choice of the…

hep-th2025

Effective density matrix for vacua in asymptotically flat gravity

Temple He, Prahar Mitra, Kathryn M. Zurek

We explicitly construct the density matrix associated to the vacuum state of a large spherically symmetric causal diamond of area in four-dimensional asymptotically flat gravit…

hep-th2025★ 3 cited

Quantum Entanglement Index in String Theory

Atish Dabholkar, Eleanor Harris, Upamanyu Moitra

We define a notion of `quantum entanglement index' with the aim to compute it for black hole horizons in string theory at one-loop order using the stringy replica method. We consid…