{
  "annotation_id": "e4843ed8-7425-493f-a0a4-912cf4c9aa06",
  "date_created": "2026-02-17T05:53:20.073000Z",
  "date_modified": "2026-02-17T05:53:20.073000Z",
  "file_hash": "45197f9b647ee369389472cc1b9435980638969465546690df24cc6f5a51ee3b",
  "private": false,
  "record": {
    "abstract": "We investigate vapor-liquid phase separation of an active near critical Lennard-Jones fluid confined within a cylindrical pore using molecular dynamics simulations. Activity is introduced via Vicsek-type alignment interactions, enabling a systematic study of how self-propulsion modifies domain morphology and coarsening kinetics under quasi-one-dimensional confinement. In the passive limit, the system undergoes early-time spinodal decomposition (diffusive growth characterized by the Lifshitz-Slyozov exponent $\\alpha = 1/3$), followed by the formation of periodically modulated, plug-like liquid domains along the pore axis. At late times, coarsening becomes kinetically arrested, and the system remains trapped in a metastable striped state. Introducing activity destabilizes this arrested morphology by enhancing collective domain transport, leading to frequent domain mergers and complete phase separation at sufficiently high activity. The late-stage coarsening then exhibits a crossover to faster, ballistic growth with an effective exponent $\\alpha = 2/3$, consistent with a cluster-coalescence mechanism. Analysis of two-point correlation functions and structure factors confirms dynamic scaling across all activity regimes. Our results demonstrate that alignment-induced activity can overcome confinement-driven kinetic arrest, providing new insight into phase separation in confined active fluids. The relevant growth laws are analyzed and interpreted using appropriate theoretical frameworks.",
    "arxiv_id": "2601.09181",
    "authors": [
      "Parameshwaran A",
      "Bhaskar Sen Gupta"
    ],
    "categories": [
      "cond-mat.soft",
      "cond-mat.mtrl-sci",
      "cond-mat.stat-mech",
      "physics.bio-ph"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "title": "Active alignment-driven coarsening in confined near-critical fluids",
    "url": "https://arxiv.org/abs/2601.09181",
    "version": "v1"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "500cb394-2264-446d-8900-6fa2ac5d4b9d",
    "id": "arXiv Dataset",
    "type": "Model",
    "variant": "snapshot-2026-01-17",
    "version": "0.1.0"
  },
  "user_id": 1000002
}