Pith Number

pith:7QZ724UZ

pith:2011:7QZ724UZPMSER5BL7MP6HSA635

not attested not anchored not stored refs pending

XUV frequency comb metrology on the ground state of helium

Christoph Gohle, Dominik Z. Kandula, Kjeld S.E. Eikema, Tjeerd J. Pinkert, Wim Ubachs

arxiv:1109.3228 v1 · 2011-09-15 · physics.atom-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{7QZ724UZPMSER5BL7MP6HSA635}

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	2026-05-18T04:02:54.275837Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fc33fd72997b2448f42bfb1fe3c81edf5a00cafc6c50646f706770ad1701d800

Aliases

arxiv: 1109.3228 · arxiv_version: 1109.3228v1 · doi: 10.48550/arxiv.1109.3228 · pith_short_12: 7QZ724UZPMSE · pith_short_16: 7QZ724UZPMSER5BL · pith_short_8: 7QZ724UZ

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/7QZ724UZPMSER5BL7MP6HSA635 \
  | 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: fc33fd72997b2448f42bfb1fe3c81edf5a00cafc6c50646f706770ad1701d800

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "61437d850287629417724d572a7d059e7800f3cf3f43edd662571f50852330d5",
    "cross_cats_sorted": [
      "physics.optics"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.atom-ph",
    "submitted_at": "2011-09-15T00:00:12Z",
    "title_canon_sha256": "9f292cbad66386ab73bd875d2ab153ac313a623973f9ebe095522be600426957"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1109.3228",
    "kind": "arxiv",
    "version": 1
  }
}