Pith Number

pith:GIEQ2KZA

pith:2009:GIEQ2KZAC5ULZYV2QE33JFMLZF

not attested not anchored not stored refs pending

Phase- coherent comparison of two optical frequency standards over 146 km using a telecommunication fiber link

Burghard Lipphardt, Gesine Grosche, Harald Schnatz, Katharina Predehl, Osama Terra, Ronald Holzwarth, Thomas Legero, Uwe Sterr

arxiv:0906.3476 v1 · 2009-06-18 · 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{GIEQ2KZAC5ULZYV2QE33JFMLZF}

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	2026-05-18T02:13:19.035197Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

32090d2b201768bce2ba8137b4958bc97ebcedaed920a31c701de728407718b0

Aliases

arxiv: 0906.3476 · arxiv_version: 0906.3476v1 · doi: 10.48550/arxiv.0906.3476 · pith_short_12: GIEQ2KZAC5UL · pith_short_16: GIEQ2KZAC5ULZYV2 · pith_short_8: GIEQ2KZA

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/GIEQ2KZAC5ULZYV2QE33JFMLZF \
  | 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: 32090d2b201768bce2ba8137b4958bc97ebcedaed920a31c701de728407718b0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e48a70f73e5711f9638f06b9cbdbb1a171ef3fd485e29d59693918fc2a204039",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.optics",
    "submitted_at": "2009-06-18T16:35:45Z",
    "title_canon_sha256": "1416bca5da85d9f165aa6614d8dc9bdce00bb5e274dc64a0b6504db7deb7b6bf"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0906.3476",
    "kind": "arxiv",
    "version": 1
  }
}