Pith Number

pith:CK75FRIM

pith:2026:CK75FRIMHTCHIOK44UP7RKNP33

not attested not anchored not stored refs pending

Deployed trusted-node quantum key distribution over 300 km with a multi-core fiber access link

Ashraf El Hassan, Daniel Spegel-Lexne, Didrik Bergstr\"om, Giulio Foletto, Guilherme B. Xavier, Joakim Argillander, Katia Gallo, Martin Clason, Mohamed Bourennane, Onur G\"unl\"u, Rui Lin

arxiv:2606.06107 v1 · 2026-06-04 · quant-ph · physics.optics

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{CK75FRIMHTCHIOK44UP7RKNP33}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-06-05T01:15:33.635558Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

12bfd2c50c3cc474395ce51ff8a9afdec609b3afcf0953d72524b1ee967227fe

Aliases

arxiv: 2606.06107 · arxiv_version: 2606.06107v1 · doi: 10.48550/arxiv.2606.06107 · pith_short_12: CK75FRIMHTCH · pith_short_16: CK75FRIMHTCHIOK4 · pith_short_8: CK75FRIM

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/CK75FRIMHTCHIOK44UP7RKNP33 \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 12bfd2c50c3cc474395ce51ff8a9afdec609b3afcf0953d72524b1ee967227fe

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1d6b8e78a23ab2506105bcc32001185babdffeacae1135a9acad941e5a7c322e",
    "cross_cats_sorted": [
      "physics.optics"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2026-06-04T12:53:46Z",
    "title_canon_sha256": "33618b6b20db253b308f618dac1583326ada16f8343e7588298d986925704b42"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2606.06107",
    "kind": "arxiv",
    "version": 1
  }
}