{
  "abstract": "We introduce a Langevin formulation of Vicsek-like active particles in which orientations evolve through finite-rate relaxation toward the local mean direction, with alignment strength $J$ and rotational diffusivity $D_r$, thereby combining Vicsek-type local consensus with XY-like orientational dynamics. Using large-scale numerical simulations, we determine the nonequilibrium phase diagram as a function of activity and alignment rate. Increasing the alignment rate drives a sequence of transitions from a homogeneous isotropic state to polar bands, a cross-sea phase of intersecting bands, a homogeneous polar state, and ultimately a micro-clustered regime. The isotropic-to-polar transition is strongly first order, as evidenced by Binder cumulants and bimodal distributions of local polarization and density, indicating coexistence of gas-like and liquid-like regions. Near the onset of collective motion, band size increases with activity but depends non-monotonically on alignment rate. Further increasing the alignment rate drives the system through the cross-sea and homogeneous polar phases before enhanced density fluctuations lead to micro-clustering. Our results demonstrate that finite-time orientational relaxation acts as a control parameter that qualitatively restructures collective behavior in polar active matter.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": "Journal reference: J. Chem. Phys. 165, 104110 (2026)",
  "arxiv": "2606.10474",
  "author_total": 3,
  "authors": [
    {
      "name": "Rajneesh Kumar"
    },
    {
      "name": "Subhransu Sekhar Mishra"
    },
    {
      "name": "Debasish Chaudhuri"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/4fercmr3qynw1.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2606.10474",
  "fulltext_url": null,
  "id": "4fercmr3qynw1",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2606.10474",
  "language": null,
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "http://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "cond-mat.soft"
    ],
    [
      "arxiv",
      "cond-mat.stat-mech"
    ],
    [
      "arxiv",
      "physics.bio-ph"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2606.10474",
  "pmcid": null,
  "pmid": null,
  "published": "2026-06-09",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/4fercmr3qynw1.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:22:19Z",
      "native_id": "2606.10474",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2606.10474"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:physics.bio-ph",
      "subfield": "biological-medical"
    },
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.soft",
      "subfield": "condensed-matter"
    },
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.stat-mech",
      "subfield": "statistical-nonlinear"
    }
  ],
  "title": "Finite-Time Orientational Relaxation Restructures Collective Motion in Polar Active Matter",
  "title_text": "Finite-Time Orientational Relaxation Restructures Collective Motion in Polar Active Matter",
  "type": "preprint",
  "updated_at": "2026-10-30T12:22:19Z",
  "url": "https://research.draconitic.com/paper/4fercmr3qynw1",
  "venue": "arXiv",
  "versions": [
    {
      "doi": "10.1063/5.0348008",
      "pid": null,
      "relation": "published-as",
      "title": null,
      "venue": null
    }
  ]
}