{
  "abstract": "Near-field wavefront curvature enables joint angle-range localization, but exploiting it entails repeated covariance-eigenspace tests over a two-dimensional spherical manifold. We propose a quantum subspace-projection algorithm (Q-SPARSE) for super-resolution estimation of parameters in the near field, employing spectral signature similar to MUSIC. Q-SPARSE prepares each spherical steering hypothesis as a quantum state, applies quantum phase estimation (QPE) to covariance-generated evolution, and converts the resolved spectral mass into a localization spectrum. The proposed method does not need the full classical preparation of the eigenstates, which is a major bottleneck of the QPE algorithm, the main subroutine in quantum variants of MUSIC algorithms. Under an ideal signal-noise partition, its score equals the classical signal-subspace overlap exactly and thus preserves the maximizer of normalized near-field MUSIC. For a finite q number of qubit phase registers, we derive the score from the complete QPE kernel, and propose a nearest-bin selection scheme with soft-thresholding based on Marchenko-Pastur-calibrated logistic weighting decision criteria. Numerical results on IBM's QISKIT software platform are demonstrated for near-field array processing.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.38500",
  "author_total": 4,
  "authors": [
    {
      "name": "Mostafizur Rahaman Laskar"
    },
    {
      "name": "Sajad Daei"
    },
    {
      "name": "Gabor Fodor"
    },
    {
      "name": "Mikael Skoglund"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/2ck999bjjj5d4.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.38500",
  "fulltext_url": null,
  "id": "2ck999bjjj5d4",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.38500",
  "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",
      "quant-ph"
    ],
    [
      "openalex",
      "1711|Direction-of-Arrival Estimation Techniques"
    ]
  ],
  "openalex": "W7215100693",
  "pdf_url": "https://arxiv.org/pdf/2609.38500",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-29",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/2ck999bjjj5d4.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:25:48Z",
      "native_id": "2609.38500",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.38500"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:quant-ph",
      "subfield": "quantum"
    }
  ],
  "title": "Q-SPARSE: Quantum Subspace Projection for Near-Field Angle-Range Spectrum Estimation",
  "title_text": "Q-SPARSE: Quantum Subspace Projection for Near-Field Angle-Range Spectrum Estimation",
  "type": "preprint",
  "updated_at": "2026-10-30T12:25:48Z",
  "url": "https://research.draconitic.com/paper/2ck999bjjj5d4",
  "venue": "arXiv",
  "versions": []
}