{
  "abstract": "We present a universal framework for simulating N -dimensional linear Itô stochastic differential equations (SDEs) on quantum computers with additive or multiplicative noises. Building on a unitary dilation technique, we establish a rigorous mapping from the general linear SDEs d X t = A ( t ) X t d t + ∑ j = 1 J B j ( t ) X t d W t j to stochastic Schrödinger equations (SSE) on a dilated Hilbert space. Crucially, this embedding is pathwise exact in that the classical solution is recovered as a projection of the dilated quantum state for each fixed noise realization. We demonstrate that the resulting SSEs are naturally implementable on digital quantum processors, where the stochastic Wiener increments are encoded directly by preparing the ancillary qubits. Exploiting this physical mapping, we develop two algorithmic strategies: (1) a trajectory-based approach that uses sequential weak measurements to realize efficient stochastic integrators, including a second-order scheme, and (2) an ensemble-based approach that maps moment evolution to a deterministic Lindblad quantum master equation, enabling simulation without Monte Carlo sampling. We provide error bounds based on a stochastic light-cone analysis and validate the framework with numerical experiments.",
  "abstract_shown": true,
  "affiliations": [
    "Department of Mathematics, The Pennsylvania State University, University Park, PA 16802, USA"
  ],
  "article_type": null,
  "arxiv": null,
  "author_total": 2,
  "authors": [
    {
      "affs": [
        0
      ],
      "name": "Hsuan-Cheng Wu"
    },
    {
      "affs": [
        0
      ],
      "name": "Xiantao Li"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/7hhvkfcjtrtzz.bib",
  "cited_by": 0,
  "doi": "10.22331/q-2026-10-01-2223",
  "fulltext_url": null,
  "id": "7hhvkfcjtrtzz",
  "issns": [
    "2521-327X"
  ],
  "landing_url": "https://quantum-journal.org/papers/q-2026-10-01-2223/",
  "language": null,
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "openalex",
      "1702|Quantum Computing Algorithms and Architecture"
    ]
  ],
  "openalex": "W7123281696",
  "pdf_url": "https://quantum-journal.org/papers/q-2026-10-01-2223/pdf/",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-01",
  "publisher": "Verein zur Forderung des Open Access Publizierens in den Quantenwissenschaften",
  "ris": "https://research.draconitic.com/paper/7hhvkfcjtrtzz.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:58Z",
      "native_id": "10.22331/q-2026-10-01-2223",
      "source": "crossref",
      "url": "https://quantum-journal.org/papers/q-2026-10-01-2223/"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "issn:2521-327X",
      "subfield": "quantum"
    }
  ],
  "title": "Universal Dilation of Linear Itô SDEs: Quantum Trajectories and Lindblad Simulation of Second Moments",
  "title_text": "Universal Dilation of Linear Itô SDEs: Quantum Trajectories and Lindblad Simulation of Second Moments",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T12:17:58Z",
  "url": "https://research.draconitic.com/paper/7hhvkfcjtrtzz",
  "venue": "Quantum",
  "versions": []
}