Pith Number

pith:QXUVHYN7

pith:2014:QXUVHYN7VIT3ULJTV23PXXWTIM

not attested not anchored not stored refs pending

Coherent optical frequency transfer at 5e-19 over a doubled 642 km fiber link

A. Godone, A. Mura, C. Clivati, C. E. Calosso, D. Calonico, D. V. Sutyrin, E. K. Bertacco, F. Levi, G. A. Costanzo, G. Tino, M. E. Zucco, M. Frittelli, N. Poli

arxiv:1404.0395 v2 · 2014-04-01 · 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{QXUVHYN7VIT3ULJTV23PXXWTIM}

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	2026-05-18T01:43:43.175976Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

85e953e1bfaa27ba2d33aeb6fbded3431cf1c95ecb0159fa2c64e1e6859f478c

Aliases

arxiv: 1404.0395 · arxiv_version: 1404.0395v2 · doi: 10.48550/arxiv.1404.0395 · pith_short_12: QXUVHYN7VIT3 · pith_short_16: QXUVHYN7VIT3ULJT · pith_short_8: QXUVHYN7

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/QXUVHYN7VIT3ULJTV23PXXWTIM \
  | 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: 85e953e1bfaa27ba2d33aeb6fbded3431cf1c95ecb0159fa2c64e1e6859f478c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4b8cc6489d9181113f537a67294931f7710a4ce01f92dfd3f2dc874d98a34c39",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.optics",
    "submitted_at": "2014-04-01T20:43:11Z",
    "title_canon_sha256": "fcae5ac83a6c4d3523910ec8b50e94ca547705d5adfb00f2d3bb009c208cb41e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1404.0395",
    "kind": "arxiv",
    "version": 2
  }
}