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Active thermodynamics of inertial chiral active gases: equation of state and edge currents

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arxiv 2509.05053 v1 pith:YPMSFMAW submitted 2025-09-05 cond-mat.soft cond-mat.stat-mech

Active thermodynamics of inertial chiral active gases: equation of state and edge currents

classification cond-mat.soft cond-mat.stat-mech
keywords activecurrentsedgethermodynamicschiralderivationdiffusionequation
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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One of the most fundamental quests in the physics of active matter concerns the existence of a comprehensive theory for its macroscopic properties, i.e. an ``active thermodynamics''. Here, we derive and experimentally verify key elements of the active thermodynamics of ideal chiral active gases, unveiling edge currents and odd diffusivity as their peculiar features. Our main results are the derivation of an equation of state relating density and pressure via a chirality-dependent effective temperature, the derivation of Fick's law including the full diffusion matrix predicting odd diffusion, and the exact prediction of edge currents at container walls that nonmonotonically depend on chirality.

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Cited by 8 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Robust Topologically Protected Edge Transport in Doubly Chiral Active Particles

    cond-mat.soft 2026-07 conditional novelty 7.0

    Doubly chiral active Brownian particles with competing intrinsic rotation and translation-rotation coupling exhibit topologically protected boundary transport without backscattering, as shown by theory, simulation, an...

  2. Geometry-Induced Transport of Self-Aligning Chiral Bristlebots

    cond-mat.soft 2026-04 unverdicted novelty 7.0

    An experimental platform of self-aligning chiral bristlebots demonstrates geometric rectification of transport and spontaneous switching between translational and rotational states in linked assemblies.

  3. Curvature-driven wall accumulation in chiral active particles

    cond-mat.soft 2026-07 unverdicted novelty 6.0

    Boundary curvature induces wall accumulation in non-motile chiral active particles confined in circular geometries via tangential wall forces, as shown by simulations and hydrodynamics.

  4. Designing topological edge currents in chiral active matter

    cond-mat.soft 2026-06 unverdicted novelty 6.0

    A chirality-switching model of 2D active particles produces robust topological edge currents in confinement and at phase-separation interfaces, distinct from standard motility-induced phase separation.

  5. Odd transport in a two-temperature Brownian dimer

    cond-mat.stat-mech 2026-06 unverdicted novelty 6.0

    Odd mobility in a two-temperature Brownian dimer produces handed correlations between particles and increases thermal conductance without altering net heat flow or dissipation under handedness reversal.

  6. Sparkling bubbles in chiral active fluids

    cond-mat.soft 2026-05 unverdicted novelty 6.0

    Chiral active fluids form rotating bubbles that dynamically break up and reform in a sparkling instability at optimal packing fractions, as predicted by coarse-grained hydrodynamics.

  7. Equation of state for the edge flow of chiral colloidal fluids

    cond-mat.soft 2026-04 unverdicted novelty 5.0

    Edge fluxes in chiral fluids equal the average odd stress in confined geometries or the jump in odd stress across interfaces in phase-separated systems.

  8. Geometry-Induced Transport of Self-Aligning Chiral Bristlebots

    cond-mat.soft 2026-04 conditional novelty 5.0

    Augmented bristlebots with self-aligning torque and chiral drift exhibit geometry-controlled edge currents and rectified transport via a nautilus-shaped ratchet.