Pith Number

pith:KFFRPTY7

pith:2000:KFFRPTY7Y6AHDCKUUQW4RD7WCR

not attested not anchored not stored refs pending

Conditional quantum state engineering in repeated 2-photon down conversion

D.-G. Welsch, H. Hansen, J. Clausen, J. Mlynek, L. Knoll

arxiv:quant-ph/0007050 v1 · 2000-07-17 · 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{KFFRPTY7Y6AHDCKUUQW4RD7WCR}

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	2026-05-18T01:17:47.464028Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

514b17cf1fc780718954a42dc88ff614711303dd1bba91c7d6cdbc89f6c435ad

Aliases

arxiv: quant-ph/0007050 · arxiv_version: quant-ph/0007050v1 · doi: 10.48550/arxiv.quant-ph/0007050 · pith_short_12: KFFRPTY7Y6AH · pith_short_16: KFFRPTY7Y6AHDCKU · pith_short_8: KFFRPTY7

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/KFFRPTY7Y6AHDCKUUQW4RD7WCR \
  | 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: 514b17cf1fc780718954a42dc88ff614711303dd1bba91c7d6cdbc89f6c435ad

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f18471a8cb87f21dbb6fbd9866473178103f0553bbd1072a733f6a2522c0640f",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "quant-ph",
    "submitted_at": "2000-07-17T13:03:40Z",
    "title_canon_sha256": "e9d4493409654e95f04654d49a8dd8206bdefd6b15ecfa7879875ada8ff60f85"
  },
  "schema_version": "1.0",
  "source": {
    "id": "quant-ph/0007050",
    "kind": "arxiv",
    "version": 1
  }
}