Pith Number

pith:5E4UJB2T

pith:2019:5E4UJB2TP7HBUWQBYXEN4S7B7U

not attested not anchored not stored refs pending

Studying fundamental limit of optical fiber links to $10^{-21}$ level

Anne Amy-Klein, Dan Xu, Fabio Stefani, Olivier Lopez, Paul-Eric Pottie, Won-Kyu Lee

arxiv:1907.11399 v1 · 2019-07-26 · quant-ph · physics.ins-det · 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{5E4UJB2TP7HBUWQBYXEN4S7B7U}

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	2026-05-17T23:39:29.197182Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e9394487537fce1a5a01c5c8de4be1fd07fcfb984e3fd54b93c88e61258cfffc

Aliases

arxiv: 1907.11399 · arxiv_version: 1907.11399v1 · doi: 10.48550/arxiv.1907.11399 · pith_short_12: 5E4UJB2TP7HB · pith_short_16: 5E4UJB2TP7HBUWQB · pith_short_8: 5E4UJB2T

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/5E4UJB2TP7HBUWQBYXEN4S7B7U \
  | 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: e9394487537fce1a5a01c5c8de4be1fd07fcfb984e3fd54b93c88e61258cfffc

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4f1842a0a90c8c8cb2f31ee98f3bea8a40829f2eae56edd1222be02740478838",
    "cross_cats_sorted": [
      "physics.ins-det",
      "physics.optics"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2019-07-26T06:59:31Z",
    "title_canon_sha256": "bd1a75b4048ba64b39382bc362cdd73795c22f6b61570dbcb752078cf269925d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1907.11399",
    "kind": "arxiv",
    "version": 1
  }
}