Pith Number

pith:Q5JXTV5L

pith:2009:Q5JXTV5LIENX27CMF5CBSWK7ZH

not attested not anchored not stored refs pending

Demonstration of a programmable source of two-photon multiqubit entangled states

Davide Brivio, Matteo G. A. Paris, Simone Cialdi

arxiv:0912.2975 v4 · 2009-12-15 · 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{Q5JXTV5LIENX27CMF5CBSWK7ZH}

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	2026-05-18T02:10:23.282682Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

875379d7ab411b7d7c4c2f4419595fc9db047a4fadb6fc219ee469ce4859ee6d

Aliases

arxiv: 0912.2975 · arxiv_version: 0912.2975v4 · doi: 10.48550/arxiv.0912.2975 · pith_short_12: Q5JXTV5LIENX · pith_short_16: Q5JXTV5LIENX27CM · pith_short_8: Q5JXTV5L

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/Q5JXTV5LIENX27CMF5CBSWK7ZH \
  | 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: 875379d7ab411b7d7c4c2f4419595fc9db047a4fadb6fc219ee469ce4859ee6d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3ce441f2091f61cb09d03fe480f62e878cef942d0268251c1f98101861c0e31c",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2009-12-15T18:28:55Z",
    "title_canon_sha256": "c8aebd22c782b209ff638e20eacbf074f3c6153e14442b5b7056788b0e6b5f48"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0912.2975",
    "kind": "arxiv",
    "version": 4
  }
}