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The complex life of hydrodynamic modes

10 Pith papers cite this work, alongside 147 external citations. Polarity classification is still indexing.

10 Pith papers citing it
147 external citations · Pith
abstract

We study analytic properties of the dispersion relations in classical hydrodynamics by treating them as Puiseux series in complex momentum. The radii of convergence of the series are determined by the critical points of the associated complex spectral curves. For theories that admit a dual gravitational description through holography, the critical points correspond to level-crossings in the quasinormal spectrum of the dual black hole. We illustrate these methods in ${\cal N}=4$ supersymmetric Yang-Mills theory in 3+1 dimensions, in a holographic model with broken translation symmetry in 2+1 dimensions, and in conformal field theory in 1+1 dimensions. We comment on the pole-skipping phenomenon in thermal correlation functions, and show that it is not specific to energy density correlations.

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2026 7 2025 3

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representative citing papers

Analytic approaches to perturbations of strongly coupled Yang-Mills plasma

hep-th · 2026-06-10 · conditional · novelty 7.0

Scalar-channel quasinormal modes of the planar AdS5 black brane are captured across all wave numbers by exact WKB quantisation, transseries resummation, and Seiberg–Witten analytic continuation, with resummed large-q predictions matching independent numerics to ten to thirty decimal places.

Linear response beyond hydrodynamic poles

hep-th · 2025-12-22 · unverdicted · novelty 7.0

Constructs a derivative expansion for linear response that matches multi-pole correlators while preserving hydrostaticity, then applies it to D3/D5 probe brane charge fluctuations to study quasihydrodynamic transport at large density.

On prethermal time crystals from semi-holography

hep-th · 2025-12-25 · unverdicted · novelty 5.0

Semi-holographic systems with perturbative and holographic sectors exhibit prethermal time crystals through dissipationless modes in hydrodynamic channels plus short-wavelength instabilities that produce inhomogeneities over a wide temperature range.

Effective Field Theories for Material Media

hep-th · 2026-07-07 · accept · novelty 4.0

Spacetime-symmetry-breaking Goldstone EFTs systematically describe bulk and localized excitations of solids, fluids, and superfluids, with new thermodynamic identifications and corrected scattering rates.

Instability of 5D Gauss-Bonnet black branes

hep-th · 2026-06-17 · unverdicted · novelty 3.0

Gauss-Bonnet black branes in five-dimensional AdS gravity are unstable when the Gauss-Bonnet coupling falls outside the conformal collider bounds, with unstable modes connected to boundary causality-violating modes by phase rotation of complex boundary momentum.

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Showing 10 of 10 citing papers.