Pith Number

pith:E7DANQ7Y

pith:2017:E7DANQ7YKCVR5LIOH53DH4CPA6

not attested not anchored not stored refs pending

Absolute frequency measurement of the $^2$S$_{1/2} \rightarrow ^2$F$_{7/2}$ optical clock transition in $^{171}$Yb$^+$ with an uncertainty of $4\times 10^{-16}$ using a frequency link to International Atomic Time

Antoine Rolland, Charles F. A. Baynham, Fred Baynes, Helen S. Margolis, Jonathan M. Jones, Kai Bongs, Patrick E. G. Baird, Patrick Gill, Peter B. R. Nisbet-Jones, Rachel M. Godun, Steven A. King

arxiv:1707.00646 v2 · 2017-07-03 · 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{E7DANQ7YKCVR5LIOH53DH4CPA6}

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	2026-05-18T00:30:01.653364Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

27c606c3f850ab1ead0e3f7633f04f07a70cb6192fd3c2fdda68ecf0d2b53202

Aliases

arxiv: 1707.00646 · arxiv_version: 1707.00646v2 · doi: 10.48550/arxiv.1707.00646 · pith_short_12: E7DANQ7YKCVR · pith_short_16: E7DANQ7YKCVR5LIO · pith_short_8: E7DANQ7Y

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/E7DANQ7YKCVR5LIOH53DH4CPA6 \
  | 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: 27c606c3f850ab1ead0e3f7633f04f07a70cb6192fd3c2fdda68ecf0d2b53202

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b202af17bfe2634cc6069557c9f3511edcb17a85927839ebd5e620d12954a217",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.atom-ph",
    "submitted_at": "2017-07-03T16:52:37Z",
    "title_canon_sha256": "7dc6da415c59865d1e5730034f635ef8ca07445fcd72ffbfeb9a3c44cf359bb8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1707.00646",
    "kind": "arxiv",
    "version": 2
  }
}