Unresolvable Identifier

arXiv:2605.02155 · detector doi_compliance · cross_source · 2026-05-19 16:38:03.727731+00:00

critical doi_compliance unresolvable_identifier

Identifier '10.1088/1751-8121/ac2a0d' is syntactically valid but the DOI registry (doi.org) returned 404, and Crossref / OpenAlex / internal corpus also have no record. The cited work could not be located through any authoritative source.

Paper page Integrity report arXiv Try DOI

Evidence text

Aharonov, D., & Perets, H. (2021). Hadamard walks with multiple coins: Transformations, entanglement, and initial state dependence. Journal of Physics A: Mathematical and Theoretical, 54(44), 445301. DOI: 10.1088/1751-8121/ac2a0d

Evidence payload

{
  "arxiv_id": null,
  "checked_sources": [
    "crossref_by_doi",
    "openalex_by_doi",
    "doi_org_head"
  ],
  "doi": "10.1088/1751-8121/ac2a0d",
  "raw_excerpt": "Aharonov, D., & Perets, H. (2021). Hadamard walks with multiple coins: Transformations, entanglement, and initial state dependence. Journal of Physics A: Mathematical and Theoretical, 54(44), 445301. DOI: 10.1088/1751-8121/ac2a0d",
  "ref_index": 13,
  "verdict_class": "cross_source"
}