Pith Number

pith:WD44NFKB

pith:2012:WD44NFKBWP4SDE37OPRKWSBSYZ

not attested not anchored not stored refs pending

Twin Quantum Cheshire Photons

Alexei Grinbaum, Issam Ibnouhsein

arxiv:1202.4894 v2 · 2012-02-22 · quant-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{WD44NFKBWP4SDE37OPRKWSBSYZ}

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	2026-05-18T02:59:31.497106Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b0f9c69541b3f921937f73e2ab4832c659ff3043f5d31a48c1d2b2713bebf73d

Aliases

arxiv: 1202.4894 · arxiv_version: 1202.4894v2 · doi: 10.48550/arxiv.1202.4894 · pith_short_12: WD44NFKBWP4S · pith_short_16: WD44NFKBWP4SDE37 · pith_short_8: WD44NFKB

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/WD44NFKBWP4SDE37OPRKWSBSYZ \
  | 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: b0f9c69541b3f921937f73e2ab4832c659ff3043f5d31a48c1d2b2713bebf73d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a372bcef3b00a6a855d76f34efad9bb4d55d86f145ceb72ad3595d874296746c",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2012-02-22T12:49:28Z",
    "title_canon_sha256": "62b3be98ce6bc9b5f37031d03f9640c3e067a624a89962a710d91e2faba587bd"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1202.4894",
    "kind": "arxiv",
    "version": 2
  }
}