My latest arXiv preprints

2025

Machine Learning H-theorem

Authors: Ruben Lier

Originally submitted: 19 Aug 2025


A microscopically reversible kinetic theory of flocking

Authors: Ruben Lier

Originally submitted: 12 Aug 2025


On the temperature of an active nematic

Authors: Jay Armas, Akash Jain, Ruben Lier

Originally submitted: 25 Jun 2025


Resistive relativistic magnetohydrodynamics without Amperes Law

Authors: Ruben Lier, Akash Jain, Jay Armas, Oliver Porth

Originally submitted: 8 Jan 2025


2024

Odd viscous flow past a sphere at low but nonzero Reynolds numbers

Authors: Ruben Lier

Originally submitted: 26 May 2024


Hydrodynamics of thermal active matter

Authors: Jay Armas, Akash Jain, Ruben Lier

Originally submitted: 17 May 2024


Holographic transport in anisotropic plasmas

Authors: Tuna Demircik, Domingo Gallegos, Umut Gürsoy, Matti Järvinen, Ruben Lier

Originally submitted: 19 Feb 2024


Slip-induced odd viscous flow past a cylinder

Authors: Ruben Lier

Originally submitted: 4 Feb 2024


Topological plasma oscillations in the solar tachocline

Authors: Ruben Lier, Richard Green, Jan de Boer, Jay Armas

Originally submitted: 15 Jan 2024


2023

A Novel Method for Holographic Transport

Authors: Tuna Demircik, Domingo Gallegos, Umut Gürsoy, Matti Järvinen, Ruben Lier

Originally submitted: 31 Oct 2023


Molecular modelling of odd viscoelastic fluids

Authors: Paweł Matus, Ruben Lier, Piotr Surówka

Originally submitted: 23 Oct 2023


Probe particles in odd active viscoelastic fluids: how activity and dissipation determine linear stability

Authors: Charlie Duclut, Stefano Bo, Ruben Lier, Jay Armas, Piotr Surówka, Frank Jülicher

Originally submitted: 12 Oct 2023


2022

Hydrodynamics of plastic deformations in electronic crystals

Authors: Jay Armas, Erik van Heumen, Akash Jain, Ruben Lier

Originally submitted: 3 Nov 2022


Fractonic Berezinskii-Kosterlitz-Thouless transition from a renormalization group perspective

Authors: Kevin T. Grosvenor, Ruben Lier, Piotr Surówka

Originally submitted: 28 Jul 2022


Lift force in odd compressible fluids

Authors: Ruben Lier, Charlie Duclut, Stefano Bo, Jay Armas, Frank Jülicher, Piotr Surówka

Originally submitted: 25 May 2022


2021

Approximate symmetries, pseudo-Goldstones, and the second law of thermodynamics

Authors: Jay Armas, Akash Jain, Ruben Lier

Originally submitted: 29 Dec 2021


Passive odd viscoelasticity

Authors: Ruben Lier, Jay Armas, Stefano Bo, Charlie Duclut, Frank Jülicher, Piotr Surówka

Originally submitted: 14 Sep 2021


Bose-Hubbard realization of fracton defects

Authors: Krzysztof Giergiel, Ruben Lier, Piotr Surówka, Arkadiusz Kosior

Originally submitted: 14 Jul 2021


2020

Quantum Hall effective action for anisotropic Dirac semi-metal

Authors: Carlos Hoyos, Ruben Lier, Francisco Peña-Benitez, Piotr Surówka

Originally submitted: 25 Jun 2020