Pith Number

pith:ARDIZBPH

pith:1999:ARDIZBPHXFF3SAH6VS6J3YW2GB

not attested not anchored not stored refs pending

Separability of entangled q-bit pairs

Berthold-Georg Englert, Nasser Metwally

arxiv:quant-ph/9912089 v2 · 1999-12-18 · 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{ARDIZBPHXFF3SAH6VS6J3YW2GB}

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	2026-05-18T01:37:52.171209Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

04468c85e7b94bb900feacbc9de2da3072cbb6aab3a977a488cdbb508f1b5131

Aliases

arxiv: quant-ph/9912089 · arxiv_version: quant-ph/9912089v2 · doi: 10.48550/arxiv.quant-ph/9912089 · pith_short_12: ARDIZBPHXFF3 · pith_short_16: ARDIZBPHXFF3SAH6 · pith_short_8: ARDIZBPH

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/ARDIZBPHXFF3SAH6VS6J3YW2GB \
  | 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: 04468c85e7b94bb900feacbc9de2da3072cbb6aab3a977a488cdbb508f1b5131

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "12fbf90cd4dea944f7a4d75e62bb7c667119069f6a6020df6eb5b108bd32324c",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "quant-ph",
    "submitted_at": "1999-12-18T18:57:09Z",
    "title_canon_sha256": "bb57bb1e2784f9c0275d606afeb485cef27426c630a3e89528c6b0d152f9a086"
  },
  "schema_version": "1.0",
  "source": {
    "id": "quant-ph/9912089",
    "kind": "arxiv",
    "version": 2
  }
}