Pith Number

pith:OSKS7DS6

pith:2002:OSKS7DS6AFJGAX4RXMJ5KHHPQO

not attested not anchored not stored refs pending

Generation of polarization-entangled photon pairs in a cascade of two type-I crystals pumped by femtosecond pulses

K. Matsumoto, K. Nakamura, K. Usami, Y. Nambu, Y. Tsuda

arxiv:quant-ph/0203115 v2 · 2002-03-22 · 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{OSKS7DS6AFJGAX4RXMJ5KHHPQO}

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	2026-07-04T16:36:01.329423Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

74952f8e5e0152605f91bb13d51cef83a6e04a63ea0f44a582c256aad4a1deaf

Aliases

arxiv: quant-ph/0203115 · arxiv_version: quant-ph/0203115v2 · doi: 10.48550/arxiv.quant-ph/0203115 · pith_short_12: OSKS7DS6AFJG · pith_short_16: OSKS7DS6AFJGAX4R · pith_short_8: OSKS7DS6

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/OSKS7DS6AFJGAX4RXMJ5KHHPQO \
  | 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: 74952f8e5e0152605f91bb13d51cef83a6e04a63ea0f44a582c256aad4a1deaf

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "780fdbb5b0bdb69b47afa7ca0175e6694d9742c982a1c25362628128ea917140",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "quant-ph",
    "submitted_at": "2002-03-22T10:06:30Z",
    "title_canon_sha256": "06dac396f018a9d4b8a7e31dbb98f5ea92130d5c05c945a13275f5e15a77fb16"
  },
  "schema_version": "1.0",
  "source": {
    "id": "quant-ph/0203115",
    "kind": "arxiv",
    "version": 2
  }
}