Pith Number

pith:MONQCGRK

pith:2026:MONQCGRKEB2GT4CPIH6LG4YZ4Y

not attested not anchored not stored refs pending

An \Al clock with $1.6\times10^{-18}$ systematic uncertainty and its frequency ratios

Christian Lisdat, Derwell Drapier, Erik Benkler, Fabian Dawel, Johannes Kramer, Johannes Rahm, Joshua Klose, Kai Dietze, Kilian Stahl, Lennart Pelzer, Marek Hild, Mirza A. Ali, Navraj Poudel, Piet O. Schmidt, S\"oren D\"orscher, Stefan Weyers, Steven A. King, Vincent Barb\'e

arxiv:2606.23151 v1 · 2026-06-22 · physics.atom-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{MONQCGRKEB2GT4CPIH6LG4YZ4Y}

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	2026-06-23T03:14:11.398015Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

639b011a2a207469f04f41fcb37319e63db7f61d7ca03477507bffe613ce3545

Aliases

arxiv: 2606.23151 · arxiv_version: 2606.23151v1 · doi: 10.48550/arxiv.2606.23151 · pith_short_12: MONQCGRKEB2G · pith_short_16: MONQCGRKEB2GT4CP · pith_short_8: MONQCGRK

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/MONQCGRKEB2GT4CPIH6LG4YZ4Y \
  | 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: 639b011a2a207469f04f41fcb37319e63db7f61d7ca03477507bffe613ce3545

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c1a7931c6efccf67c957dc0fb3864deb1b511eac0d86a95115a692122c2429e7",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "physics.atom-ph",
    "submitted_at": "2026-06-22T10:52:11Z",
    "title_canon_sha256": "db8dc7b56e0f64ce82a74dc2c3a7f2acd596a89fc4559368e8e97826cff693f3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2606.23151",
    "kind": "arxiv",
    "version": 1
  }
}