{
  "abstract": "Global gyrokinetic particle simulations remain computationally expensive, as they demand both adequate marker statistics and three-dimensional field solvers. In this work, we present a hybrid spectral method within the particle-in-Fourier (PIF) framework and implement it in the electrostatic model of GTC. Charge scatter and field gather are performed between particles and fields on a two-dimensional poloidal mesh, while the corresponding Poisson solver is discretized using radial finite differences and poloidal $m$-harmonics. Truncated spectral transforms are employed to connect multiple representations for fields, avoiding costly particle-grid operations for each individual $m$-harmonic within the particle loop. Benchmarks against conventional particle-in-cell (PIC) simulations successfully reproduce single-$n$ ion temperature gradient (ITG) mode structures and dispersion relations, as well as multi-$n$ nonlinear ITG transport and its regulation by zonal flows. Compared to conventional PIC, the proposed method reduces the effective problem size by more than a factor of 48 and achieves a speedup of over two orders of magnitude for single-$n$ cases. A 2000-step single-$n$ simulation with approximately 2 million markers completes in 78.2 seconds on a laptop GPU, while multi-$n$ turbulence simulation also completes within minutes. Furthermore, the elimination of toroidal particle-shift communication yields promising preliminary scaling performance on multiple NVIDIA A100 GPUs. The numerical scheme is broadly applicable for accelerating particle simulations on platforms ranging from laptops to supercomputers.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.03354",
  "author_total": 7,
  "authors": [
    {
      "name": "Jian Bao"
    },
    {
      "name": "Huasheng Xie"
    },
    {
      "name": "Ming Yang"
    },
    {
      "name": "Zhixin Lu"
    },
    {
      "name": "Haotian Chen"
    },
    {
      "name": "Zhihong Lin"
    },
    {
      "name": "Feng Zhang"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/2bb3fkw8e2nt9.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.03354",
  "fulltext_url": null,
  "id": "2bb3fkw8e2nt9",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.03354",
  "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",
      "physics.plasm-ph"
    ],
    [
      "openalex",
      "3106|Magnetic confinement fusion research"
    ]
  ],
  "openalex": "W7208728742",
  "pdf_url": "https://arxiv.org/pdf/2609.03354",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-03",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/2bb3fkw8e2nt9.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:18:31Z",
      "native_id": "2609.03354",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.03354"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:physics.plasm-ph",
      "subfield": "plasma"
    }
  ],
  "title": "Minute-Scale High-Fidelity Gyrokinetic Simulations with Portability from Laptop to Supercomputer",
  "title_text": "Minute-Scale High-Fidelity Gyrokinetic Simulations with Portability from Laptop to Supercomputer",
  "type": "preprint",
  "updated_at": "2026-10-30T12:18:31Z",
  "url": "https://research.draconitic.com/paper/2bb3fkw8e2nt9",
  "venue": "arXiv",
  "versions": []
}