Pith Number

pith:QCJITJ7H

pith:2015:QCJITJ7HPN2772LGMAF4NBGWC6

not attested not anchored not stored refs pending

Probing beyond the laser coherence time in optical clock comparisons

David B. Hume, David R. Leibrandt

arxiv:1508.05129 v2 · 2015-08-20 · physics.atom-ph · quant-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QCJITJ7HPN2772LGMAF4NBGWC6}

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	2026-05-18T01:17:18.895884Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

809289a7e77b75ffe966600bc684d617a3c9c8cb1a976260cd56c34d215069f2

Aliases

arxiv: 1508.05129 · arxiv_version: 1508.05129v2 · doi: 10.48550/arxiv.1508.05129 · pith_short_12: QCJITJ7HPN27 · pith_short_16: QCJITJ7HPN2772LG · pith_short_8: QCJITJ7H

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/QCJITJ7HPN2772LGMAF4NBGWC6 \
  | 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: 809289a7e77b75ffe966600bc684d617a3c9c8cb1a976260cd56c34d215069f2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6ff8ef6c679640e6e486ae64d4ab48118134305edbe9cd84ee74d80744657a8e",
    "cross_cats_sorted": [
      "quant-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.atom-ph",
    "submitted_at": "2015-08-20T21:19:17Z",
    "title_canon_sha256": "2b83dda7c8cd9f304b25fcb9851d31ecd10e2c590143420b892d044bc5d912e7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1508.05129",
    "kind": "arxiv",
    "version": 2
  }
}