Pith Number

pith:Z5U2NS2O

pith:2012:Z5U2NS2OOW6BLAOHTCBQ463BQQ

not attested not anchored not stored refs pending

Photon-number distributions of twin beams generated in spontaneous parametric down-conversion and measured by an intensified CCD camera

Jan Perina Jr, Martin Hamar, Ondrej Haderka, Vaclav Michalek

arxiv:1202.1437 v1 · 2012-02-07 · 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{Z5U2NS2OOW6BLAOHTCBQ463BQQ}

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	2026-05-18T01:58:32.907631Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

cf69a6cb4e75bc1581c798830e7b6184379859aa16b5e42d7cdd5b793cb09ca3

Aliases

arxiv: 1202.1437 · arxiv_version: 1202.1437v1 · doi: 10.48550/arxiv.1202.1437 · pith_short_12: Z5U2NS2OOW6B · pith_short_16: Z5U2NS2OOW6BLAOH · pith_short_8: Z5U2NS2O

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/Z5U2NS2OOW6BLAOHTCBQ463BQQ \
  | 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: cf69a6cb4e75bc1581c798830e7b6184379859aa16b5e42d7cdd5b793cb09ca3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1ce969355e8ae6af0a2b4679500fead9c26b0204b7d4a4292a3a9b5a54193c78",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2012-02-07T14:41:19Z",
    "title_canon_sha256": "65171338008587469eb10b911c20a9f7e6d663fa3426ab820e18eb7bf3b4f600"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1202.1437",
    "kind": "arxiv",
    "version": 1
  }
}