Pith Number

pith:WQLBGYYP

pith:2015:WQLBGYYPPZ6ZJQQXT3ID6HSBVU

not attested not anchored not stored refs pending

Synchronization of Distant Optical Clocks at the Femtosecond Level

Esther Baumann, Fabrizio R. Giorgetta, Hugo Bergeron, Ian Coddington, Jean-Daniel Deschenes, Laura C. Sinclair, Michael Cermak, Nathan R. Newbury, William C. Swann

arxiv:1509.07888 v3 · 2015-09-25 · 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{WQLBGYYPPZ6ZJQQXT3ID6HSBVU}

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	2026-05-18T01:14:44.956789Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b41613630f7e7d94c2179ed03f1e41ad0b0bc193b6139f49ba75cb61e649e8a4

Aliases

arxiv: 1509.07888 · arxiv_version: 1509.07888v3 · doi: 10.48550/arxiv.1509.07888 · pith_short_12: WQLBGYYPPZ6Z · pith_short_16: WQLBGYYPPZ6ZJQQX · pith_short_8: WQLBGYYP

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/WQLBGYYPPZ6ZJQQXT3ID6HSBVU \
  | 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: b41613630f7e7d94c2179ed03f1e41ad0b0bc193b6139f49ba75cb61e649e8a4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "58357046657749fe147c62586f47c5c1fde0739041b51a498029b7a41607a190",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.optics",
    "submitted_at": "2015-09-25T20:46:24Z",
    "title_canon_sha256": "6fd96e42fbd82d1d4eee04450c4dd7ed87885ad2cb450c2057143512082c5542"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1509.07888",
    "kind": "arxiv",
    "version": 3
  }
}