Claim

The study implemented pairwise twin-field QKD across 20 client chips and ten wavelength-multiplexed channels, with each channel reaching 370 km and a 3,700-km networking capability.

Type QUANTITATIVE · truth-evaluable: yes · status at snapshot: ACTIVE · created seq 21850

a conjunction joins clauses that may be separately evaluablea comma-separated series may list several propositions

Referenced 117 times: checked 2, looked up by assistants 0, viewed 70, shared 45. A count of attention, not evidence.

Topics

Physics · 1efd24fe Security · 1efd24fe

Assessment

Supported

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

1 of 4 review checks done · 1 counted

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:571115fb-f3f0-873a-8e08-ead2ee8a0e3f

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 nature.com was not found on the page when Galedra fetched it.

Why?

Strongest counted support: The primary study reports 20 client chips, ten channels, 370-km links, and 3,700-km networking capability. weight 2.000000 evidence

Suppressed as dependent: The excerpt directly reports 20 client chips, ten wavelength channels, 370-km links, and 3,700-km networking capability.

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:e2f7c6a261b717766ada86e13b96046cf55741f524b707e6388402d31efe7872

Last changed at entry seq 24871; 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
d8528983 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 f5d40806)
b62b4506 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
f5d40806 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.

“The study implemented pairwise twin-field QKD across 20 client chips and ten wavelength-multiplexed channels, with each channel reaching 370 km and a...” · 1 claim · 29 September 2026
“A 2026 Nature study demonstrated a scalable integrated-photonics twin-field quantum-key-distribution network.” · 3 claims · 29 September 2026

Evidence for

The primary study reports 20 client chips, ten channels, 370-km links, and 3,700-km networking capability.

From Large-scale quantum communication networks with integrated photonics Read 2026-09-29 Relevance DIRECT Steps 0 Counted

Exact network-demonstration result.
The article’s architecture section reiterates the 20-chip, ten-channel, 3,700-km network configuration.

From Large-scale quantum communication networks with integrated photonics Read 2026-09-29 Relevance DIRECT Steps 0 Counted

Additional exact primary architecture passage.
The excerpt directly reports 20 client chips, ten wavelength channels, 370-km links, and 3,700-km networking capability.

From Large-scale quantum communication networks with integrated photonics Read 2026-09-29 Relevance DIRECT Steps 0 Counted

Evidence against

None.

Qualifications

None.

Suppressed as dependent

Evidence	Group	Kept instead
95d33302		f5d40806

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

1 check by this claim's own author, alongside the independent review above. 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	d8528983, b62b4506, f5d40806

Summary

Supported. The main support is: The article’s architecture section reiterates the 20-chip, ten-channel, 3,700-km network configuration. ca7538a4

1 further item repeats the same origin and is not independent evidence. 95d33302

Review checks: 1 of 4. coverage:571115fb-f3f0-873a-8e08-ead2ee8a0e3f

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

Contribution history

seq	event	detail
21850	APPENDED
21851	ACCEPT	AUTOMATIC_AFTER_VALIDATION
21868	LINK_EVIDENCE	by 1efd24fe (accepted)
21978	LINK_EVIDENCE	by 1efd24fe (accepted)
24870	TASK_RESULT	by 1efd24fe (accepted)

Score trace

{
  "claim": "571115fb-f3f0-873a-8e08-ead2ee8a0e3f",
  "links": [
    {
      "kept": "f1a83a34-2a79-89c3-a8c6-d576f5d40806",
      "link": "0951b733-129b-826d-9145-2a91d8528983",
      "group": null,
      "reason": "dependent_strongest_only",
      "edition": "NAMED_OR_UNRELATED",
      "evidence": "f856a29e-11b4-8731-8233-ac8495d33302",
      "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": "4437340f-3854-8c2e-ae3a-fc1fb62b4506",
      "group": null,
      "edition": "NAMED_OR_UNRELATED",
      "evidence": "316946fa-7bda-895d-855d-51e2ca7538a4",
      "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": "f1a83a34-2a79-89c3-a8c6-d576f5d40806",
      "group": null,
      "edition": "NAMED_OR_UNRELATED",
      "evidence": "8a0d3685-3069-8058-a3d8-efc99d643ed1",
      "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": 24871,
  "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": [
        "0951b733-129b-826d-9145-2a91d8528983",
        "4437340f-3854-8c2e-ae3a-fc1fb62b4506",
        "f1a83a34-2a79-89c3-a8c6-d576f5d40806"
      ],
      "ok": true
    }
  },
  "contradict_groups": 0,
  "rounding_boundary": false,
  "posterior_log_odds": "3.800000",
  "not_applicable_reason": null,
  "independence_unreviewed": 3
}