Zobrazeno 1 - 10
of 48
pro vyhledávání: '"Serantes, Alexandre"'
General Relativity predicts that the spacetime near a cosmological singularity undergoes an infinite number of chaotic oscillations between different Kasner epochs with rapid transitions between them. This so-called BKL behaviour persists in the pres
Externí odkaz:
http://arxiv.org/abs/2312.11643
As an effective theory, relativistic hydrodynamics is fixed by symmetries up to a set of transport coefficients. A lot of effort has been devoted to explicit calculations of these coefficients. Here we propose a shift in perspective: we deploy bootst
Externí odkaz:
http://arxiv.org/abs/2305.07703
We use causality to derive a number of simple and universal constraints on dispersion relations, which describe the location of singularities of retarded two-point functions in relativistic quantum field theories. We prove that all causal dissipative
Externí odkaz:
http://arxiv.org/abs/2212.07434
Autor:
Serantes, Alexandre, Withers, Benjamin
Given a set of sources and one-point function data for a Lorentzian holographic QFT, does the Fefferman-Graham expansion converge? If it does, what sets the radius of convergence, and how much of the interior of the spacetime can be reconstructed usi
Externí odkaz:
http://arxiv.org/abs/2207.07132
Autor:
Heller, Michal P., Serantes, Alexandre, Spaliński, Michał, Svensson, Viktor, Withers, Benjamin
Publikováno v:
Phys. Rev. X 12, 041010 (2022)
There is growing evidence that the hydrodynamic gradient expansion is factorially divergent. We advocate for using Dingle's singulants as a way to gain analytic control over its large-order behaviour for nonlinear flows. Within our approach, singulan
Externí odkaz:
http://arxiv.org/abs/2112.12794
Autor:
Heller, Michal P., Serantes, Alexandre, Spaliński, Michał, Svensson, Viktor, Withers, Benjamin
Publikováno v:
Phys. Rev. Lett. 128, 122302 (2022)
The gradient expansion is the fundamental organising principle underlying relativistic hydrodynamics, yet understanding its convergence properties for general nonlinear flows has posed a major challenge. We introduce a simple method to address this q
Externí odkaz:
http://arxiv.org/abs/2110.07621
Autor:
Heller, Michal P., Serantes, Alexandre, Spaliński, Michał, Svensson, Viktor, Withers, Benjamin
Publikováno v:
SciPost Phys. 10, 123 (2021)
We study the mechanisms setting the radius of convergence of hydrodynamic dispersion relations in kinetic theory in the relaxation time approximation. This introduces a qualitatively new feature with respect to holography: a nonhydrodynamic sector re
Externí odkaz:
http://arxiv.org/abs/2012.15393
Autor:
Heller, Michal P., Serantes, Alexandre, Spaliński, Michał, Svensson, Viktor, Withers, Benjamin
The large proper-time behaviour of expanding boost-invariant fluids has provided many crucial insights into quark-gluon plasma dynamics. Here we formulate and explore the late-time behaviour of nonequilibrium dynamics at the level of linearized pertu
Externí odkaz:
http://arxiv.org/abs/2011.13864
Autor:
Heller, Michal P., Serantes, Alexandre, Spaliński, Michał, Svensson, Viktor, Withers, Benjamin
Publikováno v:
Phys. Rev. D 104, 066002 (2021)
A foundational question in relativistic fluid mechanics concerns the properties of the hydrodynamic gradient expansion at large orders. We establish the precise conditions under which this gradient expansion diverges for a broad class of microscopic
Externí odkaz:
http://arxiv.org/abs/2007.05524
This work addresses the response of a holographic conformal field theory to a homogeneous gravitational periodic driving. The dual geometry is the AdS-soliton, which models a strongly coupled quantum system in a gapped phase, on a compact domain. The
Externí odkaz:
http://arxiv.org/abs/1903.05618