{
  "$schema": "https://themachinepress.com/schemas/story-v1.schema.json",
  "schema_version": "1.0.0",
  "document_type": "machine_press_story",
  "story": {
    "story_id": "mp-2026-10-05-007",
    "source_story_id": "tmp-story-scalable-passive-qram",
    "edition_id": "mp-2026-10-05-morning-0088",
    "edition_url": "https://themachinepress.com/edition/2026-10-05",
    "position": 7,
    "story_type": "dispatch",
    "section": "research",
    "editorial_classification": "editorial",
    "headline": "A Passive QRAM Query Used Polylogarithmic Energy",
    "slug": "a-passive-qram-query-used-polylogarithmic-energy",
    "dek": "A time-independent Hamiltonian blueprint targets logarithmic query energy and log-squared runtime.",
    "summary": "A time-independent Hamiltonian blueprint targets logarithmic query energy and log-squared runtime.",
    "body_text": "The proposed QRAM construction stores N memory bits behind an n-qubit address and evolves a pre-manufactured, time-independent four-local Hamiltonian. The authors prove O(log N) energy and O(log-squared N) runtime per query, with O(N) Hamiltonian terms and at most four terms touching any qubit. It is a feasibility blueprint, not an experimental memory device.",
    "why_it_matters": "A time-independent Hamiltonian blueprint targets logarithmic query energy and log-squared runtime.",
    "limitations": [
      "It is a feasibility blueprint, not an experimental memory device."
    ],
    "importance": 8,
    "canonical_url": "https://themachinepress.com/story/mp-2026-10-05-007/a-passive-qram-query-used-polylogarithmic-energy",
    "json_url": "https://themachinepress.com/story/mp-2026-10-05-007.json",
    "first_published_at": "2026-10-05T09:00:00.000-04:00",
    "modified_at": "2026-10-05T09:00:00.000-04:00",
    "content_status": "new",
    "is_carryover": false,
    "carryover_reason": null,
    "key_claims": [
      {
        "claim_id": "claim-mp-2026-10-05-007-001",
        "text": "A time-independent Hamiltonian blueprint targets logarithmic query energy and log-squared runtime.",
        "source_ids": [
          "source-2026-10-05-007"
        ],
        "qualification": "It is a feasibility blueprint, not an experimental memory device."
      }
    ],
    "source_ids": [
      "source-2026-10-05-007"
    ],
    "tags": [
      "QRAM",
      "quantum memory",
      "Hamiltonians"
    ],
    "image_url": null,
    "corrections": []
  },
  "sources": [
    {
      "source_id": "source-2026-10-05-007",
      "title": "arXiv preprint 2610.03700",
      "publisher": "arXiv",
      "url": "https://arxiv.org/abs/2610.03700",
      "canonical_url": "https://arxiv.org/abs/2610.03700",
      "source_type": "primary_research",
      "is_primary_source": true,
      "published_at": "2026-10-02T13:55:30.000-04:00",
      "accessed_at": "2026-10-05T08:30:00.000-04:00",
      "supports_claim_ids": [
        "claim-mp-2026-10-05-007-001"
      ]
    }
  ],
  "corrections": [],
  "publisher": {
    "name": "The Machine Press",
    "url": "https://themachinepress.com",
    "description": "A daily newspaper for the age of artificial intelligence."
  },
  "cite_this_report": {
    "title": "A Passive QRAM Query Used Polylogarithmic Energy",
    "publisher": "The Machine Press",
    "published_at": "2026-10-05T09:00:00.000-04:00",
    "canonical_url": "https://themachinepress.com/story/mp-2026-10-05-007/a-passive-qram-query-used-polylogarithmic-energy"
  }
}