Claim

A Nature Communications study reported tunable frequency beamsplitters on an integrated silicon quantum-frequency processor with success probabilities exceeding 94% and fidelities above 99.9%.

Type QUANTITATIVE · truth-evaluable: yes · status at snapshot: ACTIVE · created seq 14339 · qualifiers {"sampling":"Reported device-level demonstration metrics; not a claim of universal processor performance."}

a conjunction joins clauses that may be separately evaluable

Referenced 95 times: checked 2, looked up by assistants 0, viewed 61, shared 32. A count of attention, not evidence.

Topics

Science · 1efd24fe Physics · 1efd24fe

Assessment

Supported

Score: 0.9781 under ledger-default@0.3.0 at snapshot 27745

2 of 4 review checks done · 1 counted · 1 by the author only

2 independent evidence lineages · review checks 1 of 4 · stability HIGH

Main unresolved issue: 3 counted evidence items have no independence review; repeats of one origin may be counted as several coverage:ce97b1bf-a710-82c8-b0d7-3a390325043f

Not yet independently audited.Evidence reviewed so far supports this claim, but only 1 of 4 review checks has been done.A quoted passage from arxiv.org and nature.com was not found on the page when Galedra fetched it.

Why?

Strongest counted support: The abstract reports the integrated components, beamsplitter metrics, Bell-state fidelity, and chip dimensions. weight 2.000000 evidence

Suppressed as dependent: The passage directly reports tunable frequency beamsplitters exceeding 94% success probability and above 99.9% fidelity on the integrated chip.

Review gaps: qualifiers reviewed, opposing search done, independence reviewed

What would most change this: One independent, direct measurement that contradicts this claim would move it from Supported to Supported.

Hide calculation

0.9781 under ledger-default@0.3.0 at snapshot 27745 · state Supported · Review checks: 1 of 4 · stability HIGH · 3 sources, 2 independent lineages

Model ledger-default@0.3.0 (the default model, not the answer) · snapshot 27745 · trace sha256:49b5853ae530f18816ca14e2936fd3382fef9a51e53289bb74626172684e190c

Last changed at entry seq 14792; nothing logged since has borne on this claim.

How the number was reached

Each counted link is weighed by multiplying the factors the model declares; a factor it does not declare is not shown. Every factor name below links to what that number means.

Link	Working	Weight	Counted as
a7b947f9 support	relevance DIRECT 2.0 × observation DIRECT_TEXT 0.9 × interpretation 0 steps, 1 − 0.15 × 0 1.000000 × authenticity UNVERIFIED 1.0 × extraction UNVERIFIED 1.0 × provenance INDEPENDENT 1.0 × edition NAMED_OR_UNRELATED 1	1.800000	0.000000 (dependent strongest only, kept c9713348)
f973b377 support	relevance DIRECT 2.0 × observation DIRECT_TEXT 0.9 × interpretation 0 steps, 1 − 0.15 × 0 1.000000 × authenticity UNVERIFIED 1.0 × extraction UNVERIFIED 1.0 × provenance INDEPENDENT 1.0 × edition NAMED_OR_UNRELATED 1	1.800000	1.800000
c9713348 support	relevance DIRECT 2.0 × observation MEASUREMENT 1.0 × interpretation 0 steps, 1 − 0.15 × 0 1.000000 × authenticity UNVERIFIED 1.0 × extraction UNVERIFIED 1.0 × provenance INDEPENDENT 1.0 × edition NAMED_OR_UNRELATED 1	2.000000	2.000000

prior 0.50 → log-odds 0.000000 + 3.800000 (the counted weights) = 3.800000 → probability 0.9781

Under neighbouring settings of the same model: 0.9346 to 0.9929, a spread of 0.0583.

Half-even rounding, six places for weights and four for the probability. The same inputs under the same model reproduce this exactly; that is what the trace hash above is for. How a score is worked out explains every factor, why it is there, and what the model sets it to.

Your view

Registered views

Nobody has registered a view yet.

Registered views are personal belief, not evidence: they never change Galedra's assessment. Affiliations are self-declared and shown only for groups of 5 or more.

Checked as part of

Statements this claim was broken out of. The claim is scored on its own; a statement's reading only counts its claims.

“A Nature Communications study reported tunable frequency beamsplitters on an integrated silicon quantum-frequency processor with success probabilities...” · 1 claim · 28 September 2026
“A 2026 Nature Communications study reported a fully integrated quantum frequency processor on a 4 × 7 mm silicon photonic chip, with tunable frequency...” · 2 claims · 28 September 2026

Evidence for

The abstract reports the integrated components, beamsplitter metrics, Bell-state fidelity, and chip dimensions.

From Fully integrated quantum frequency processor on a silicon chip Read 2026-09-29 Relevance DIRECT Steps 0 Counted

The abstract directly states the beamsplitter performance metrics.
The passage directly reports tunable frequency beamsplitters exceeding 94% success probability and above 99.9% fidelity on the integrated chip.

From Fully integrated quantum frequency processor on a silicon chip Read 2026-09-29 Relevance DIRECT Steps 0 Counted
The public preprint reports the same above-94% success and above-99.9% fidelity metrics for tunable frequency beamsplitters.

From Fully integrated quantum frequency processor on a silicon chip Read 2026-09-28 Relevance DIRECT Steps 0 Counted

Preprint and Nature Communications article are the same paper lineage; this is not treated as independent corroboration.

Evidence against

None.

Qualifications

None.

Suppressed as dependent

Evidence	Group	Kept instead
babc6200		c9713348

Inferences

Concluded from

None.

Used as a premise in

None.

An inference is interpretation, not evidence: it never changes the assessment of its conclusion. Each premise is a claim with its own evidence.

Threads

None. Threads are for disagreements about how a determination was made — a statement whose figures are not in the passage it rests on, two sources that may share an origin. Something about the world belongs in the evidence above.

Claim edges

None. Edges are stored and displayed; v0.1 does not propagate probability across them.

Review checklist

Review checks: 1 of 4

2 checks by this claim's own author, alongside the independent review above. 1 QUALIFIER CHECK · 1 EVIDENCE VERIFICATION. A check by the person who recorded a claim does not raise its review coverage.

Check	Done	By
qualifiers reviewed	no
opposing search done	no
independence reviewed	no
primary source reviewed	yes	a7b947f9, f973b377, c9713348

Summary

Supported. The main support is: The public preprint reports the same above-94% success and above-99.9% fidelity metrics for tunable frequency beamsplitters. fd864883

1 further item repeats the same origin and is not independent evidence. babc6200

Review checks: 1 of 4. coverage:ce97b1bf-a710-82c8-b0d7-3a390325043f

Generated by stub-v0.1; every sentence cites graph ids.

Contribution history

seq	event	detail
14339	APPENDED
14340	ACCEPT	AUTOMATIC_AFTER_VALIDATION
14349	LINK_EVIDENCE	by 1efd24fe (accepted)
14360	TASK_RESULT	by 1efd24fe (accepted)
14386	LINK_EVIDENCE	by 1efd24fe (accepted)

Score trace

{
  "claim": "ce97b1bf-a710-82c8-b0d7-3a390325043f",
  "links": [
    {
      "kept": "eccb3e25-c152-823f-8e9b-3f86c9713348",
      "link": "0965288f-f8ee-8b65-86d2-24aca7b947f9",
      "group": null,
      "reason": "dependent_strongest_only",
      "edition": "NAMED_OR_UNRELATED",
      "evidence": "901323eb-86ec-8dcb-9451-dc9cbabc6200",
      "direction": "SUPPORT",
      "magnitude": "1.800000",
      "relevance": "DIRECT",
      "extraction": "UNVERIFIED",
      "provenance": "INDEPENDENT",
      "observation": "DIRECT_TEXT",
      "source_type": "PRIMARY_TEXT",
      "authenticity": "UNVERIFIED",
      "audit_confirmed": false,
      "effective_weight": "0.000000",
      "interpretive_steps": 0
    },
    {
      "link": "63671041-585b-85ce-b08b-2a72f973b377",
      "group": null,
      "edition": "NAMED_OR_UNRELATED",
      "evidence": "7fbc9e44-a5aa-892d-b0f4-569ffd864883",
      "direction": "SUPPORT",
      "magnitude": "1.800000",
      "relevance": "DIRECT",
      "extraction": "UNVERIFIED",
      "provenance": "INDEPENDENT",
      "observation": "DIRECT_TEXT",
      "source_type": "PRIMARY_TEXT",
      "authenticity": "UNVERIFIED",
      "audit_confirmed": false,
      "effective_weight": "1.800000",
      "interpretive_steps": 0
    },
    {
      "link": "eccb3e25-c152-823f-8e9b-3f86c9713348",
      "group": null,
      "edition": "NAMED_OR_UNRELATED",
      "evidence": "4864329a-40e5-890c-8dc5-0b321934230e",
      "direction": "SUPPORT",
      "magnitude": "2.000000",
      "relevance": "DIRECT",
      "extraction": "UNVERIFIED",
      "provenance": "INDEPENDENT",
      "observation": "MEASUREMENT",
      "source_type": "PRIMARY_TEXT",
      "authenticity": "UNVERIFIED",
      "audit_confirmed": false,
      "effective_weight": "2.000000",
      "interpretive_steps": 0
    }
  ],
  "model": "ledger-default@0.3.0",
  "prior": "0.50",
  "variants": {
    "spread": "0.0583",
    "permissive": "0.9929",
    "conservative": "0.9346"
  },
  "code_hash": "sha256:c61a6fdf35a754a0d7e958df149036a083c0eaeb7d2d2e52704ec32b0c36def7",
  "contested": false,
  "stability": "HIGH",
  "claim_type": "QUANTITATIVE",
  "config_hash": "sha256:86768038080b8ab5233f1e4b7aba10af05b5bb44caa432095150b90e81209809",
  "probability": "0.9781",
  "provisional": true,
  "evidence_sum": "3.800000",
  "snapshot_seq": 14792,
  "prior_log_odds": "0.000000",
  "support_groups": 2,
  "model_dependent": false,
  "review_coverage": "0.25",
  "truth_evaluable": true,
  "assessment_state": "SUPPORTED",
  "review_checklist": {
    "qualifiers_reviewed": {
      "by": [],
      "ok": false
    },
    "opposing_search_done": {
      "by": [],
      "ok": false
    },
    "independence_reviewed": {
      "by": [],
      "ok": false
    },
    "primary_source_reviewed": {
      "by": [
        "0965288f-f8ee-8b65-86d2-24aca7b947f9",
        "63671041-585b-85ce-b08b-2a72f973b377",
        "eccb3e25-c152-823f-8e9b-3f86c9713348"
      ],
      "ok": true
    }
  },
  "contradict_groups": 0,
  "rounding_boundary": false,
  "posterior_log_odds": "3.800000",
  "not_applicable_reason": null,
  "independence_unreviewed": 3
}