From Frame Covariance to the Swampland Distance Conjecture

This paper resolves the ambiguity of field space geometry in gravitational effective field theories by developing a frame-covariant framework that interprets conformal frames as distinct foliations of a higher-dimensional auxiliary geometry, thereby demonstrating that key Swampland Distance Conjectures are universal consequences of frame covariance rather than specific quantum gravity constraints.

Sotirios Karamitsos, Benjamin Muntz2026-03-02⚛️ hep-th

Scalar vacuum densities on Beltrami pseudosphere

This paper investigates the vacuum expectation values of the field squared and energy-momentum tensor for a charged scalar field on a (2+1)-dimensional Beltrami pseudosphere with a compactified azimuthal coordinate, revealing that while geometric contributions are divergent, topological effects are finite and exhibit distinct power-law behaviors depending on the field mass, curvature coupling, and compactification scale.

T. A. Petrosyan2026-03-02⚛️ hep-th

Covariant eigenmode overlap formalism for gravitational wave signals in electromagnetic cavities

This paper presents a coordinate-invariant formalism using eigenmode expansion to model the interaction between gravitational waves and resonant detectors, specifically deriving coupling coefficients that account for damping and back-action to facilitate numerical analysis of high-frequency experiments in arbitrary electromagnetic cavity geometries.

Jordan Gué, Tom Krokotsch, Gudrid Moortgat-Pick2026-03-02⚛️ hep-th

Universality of the Blandford-Znajek emission in stationary and axisymmetric spacetimes

This paper demonstrates that while the lowest-order Blandford-Znajek jet power is universal across generic stationary and axisymmetric black-hole spacetimes, the next-leading-order corrections depend on the specific spacetime geometry, offering a potential method to distinguish rapidly rotating black holes through combined measurements of jet luminosity and angular velocity.

Filippo Camilloni, Luciano Rezzolla2026-03-02⚛️ hep-th

From QED3_3 to Self-Dual Multicriticality in the Fradkin-Shenker Model

This paper proposes a continuum QED3_3 description with emergent symmetries for the multicritical point in a staggered Fradkin-Shenker model, demonstrating how it connects to the original model and establishing a duality with the easy-plane CP1\mathbb{CP}^1 model that implies a deconfined quantum multicritical point separating a gapped Z2\mathbb{Z}_2 spin liquid from a Néel phase.

Thomas T. Dumitrescu, Pierluigi Niro, Ryan Thorngren2026-03-02⚛️ hep-th