Pith Number

pith:DG4DDEHZ

pith:2013:DG4DDEHZPZHC5PAHD5VA34VCBS

not attested not anchored not stored refs pending

An Optimized Photon Pair Source for Quantum Circuits

Benjamin Brecht, Christine Silberhorn, Christoph Marquardt, Georg Harder, Thomas Dirmeier, Vahid Ansari

arxiv:1304.6635 v2 · 2013-04-24 · 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{DG4DDEHZPZHC5PAHD5VA34VCBS}

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	2026-05-18T03:21:53.514800Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

19b83190f97e4e2ebc071f6a0df2a20c8c15b6cc8fa9777bf9442bb200440592

Aliases

arxiv: 1304.6635 · arxiv_version: 1304.6635v2 · doi: 10.48550/arxiv.1304.6635 · pith_short_12: DG4DDEHZPZHC · pith_short_16: DG4DDEHZPZHC5PAH · pith_short_8: DG4DDEHZ

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/DG4DDEHZPZHC5PAHD5VA34VCBS \
  | 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: 19b83190f97e4e2ebc071f6a0df2a20c8c15b6cc8fa9777bf9442bb200440592

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "70383381673c4c4b8a7af2ec3976b39afef6b9788619d325b7217de79415d07b",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2013-04-24T15:49:01Z",
    "title_canon_sha256": "d464c9e2740997eb757e4f213f14bbb9e0937f1dcbe561650b2df6a37d7eab52"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1304.6635",
    "kind": "arxiv",
    "version": 2
  }
}