Pith Number

pith:3DFM3L2N

pith:2012:3DFM3L2NEQVNKCTHY4TENDTIFJ

not attested not anchored not stored refs pending

Direct comparison of a Ca+ single ion clock against a Sr optical lattice clock

Asahiko Nogami, Clayton Locke, Hidekazu Hachisu, Kazuhiro Hayasaka, Kensuke Matsubara, Masatoshi Kajita, Mizuhiko Hosokawa, Shigeo Nagano, Tetsuya Ido, Ying Li

arxiv:1208.4654 v1 · 2012-08-23 · physics.atom-ph · physics.optics · 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{3DFM3L2NEQVNKCTHY4TENDTIFJ}

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	2026-05-18T03:44:59.979817Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d8cacdaf4d242ad50a67c726468e682a4f13a0c30b3646a89fa6b36efff3031a

Aliases

arxiv: 1208.4654 · arxiv_version: 1208.4654v1 · doi: 10.48550/arxiv.1208.4654 · pith_short_12: 3DFM3L2NEQVN · pith_short_16: 3DFM3L2NEQVNKCTH · pith_short_8: 3DFM3L2N

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/3DFM3L2NEQVNKCTHY4TENDTIFJ \
  | 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: d8cacdaf4d242ad50a67c726468e682a4f13a0c30b3646a89fa6b36efff3031a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "342822b7e4008cb5e0b5d6223e6e301aaf4544703a36bfd2a76c709abb13232a",
    "cross_cats_sorted": [
      "physics.optics",
      "quant-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.atom-ph",
    "submitted_at": "2012-08-23T01:16:17Z",
    "title_canon_sha256": "2f060c814ffc91dd4255da6b43b297fad1fb211d369197e8446460e1da2166fd"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1208.4654",
    "kind": "arxiv",
    "version": 1
  }
}