{
  "abstract": "Long-baseline optical links for space interferometry and satellite quantum networks rely on heterodyne phase tracking under Doppler motion and gravitational frequency shifts. These relativistic shifts can generate large detector-frame beat-frequency offsets over finite readout windows and thereby constrain the temporal precision of front-end phase readout. We develop a detector-frame framework for this problem using an effective two-mode signal--local-oscillator model in which relativistic motion rescales the local-oscillator frequency. Within this setting we derive closed-form Mandelstam--Tamm and Margolus--Levitin bounds for representative Gaussian resources and connect global state distinguishability with the operational precision of heterodyne phase tracking. In the bright-local-oscillator regime we identify a geometric--operational mismatch: the joint optical state can evolve on arbitrarily short global timescales while the relevant information rate is set by the measured detector record. Combining this result with an open-loop transient-acquisition analysis, we show that white phase noise and relativistic beat-frequency drift that is approximately constant over the acquisition window generate a cube-root scaling benchmark for the optimal pre-lock open-loop integration window and the minimum residual phase error. These results establish detector-frame benchmarks for quantum-limited heterodyne timing in relativistic optical links and clarify how global dynamical bounds enter task-restricted continuous optical measurements.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": "Journal reference: Advanced Quantum Technologies 9 (2026), e70446",
  "arxiv": "2610.13963",
  "author_total": 4,
  "authors": [
    {
      "name": "Salman Sajad Wani"
    },
    {
      "name": "Aatif Kaisar Khan"
    },
    {
      "name": "Saif Al-Kuwari"
    },
    {
      "name": "Mir Faizal"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/83n9p4racqtrm.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.13963",
  "fulltext_url": null,
  "id": "83n9p4racqtrm",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.13963",
  "language": null,
  "licence": "CC0-1.0",
  "licence_label": "CC0",
  "licence_source": "article",
  "licence_url": "http://creativecommons.org/publicdomain/zero/1.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "quant-ph"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2610.13963",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-01",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/83n9p4racqtrm.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:29:06Z",
      "native_id": "2610.13963",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.13963"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:quant-ph",
      "subfield": "quantum"
    }
  ],
  "title": "Detector-Frame Quantum Limits for Heterodyne Timing in Relativistic Optical Links",
  "title_text": "Detector-Frame Quantum Limits for Heterodyne Timing in Relativistic Optical Links",
  "type": "preprint",
  "updated_at": "2026-10-30T12:29:06Z",
  "url": "https://research.draconitic.com/paper/83n9p4racqtrm",
  "venue": "arXiv",
  "versions": [
    {
      "doi": "10.1002/qute.70446",
      "pid": null,
      "relation": "published-as",
      "title": null,
      "venue": null
    }
  ]
}