Pith Number

pith:SPMC3GES

pith:2009:SPMC3GESJAQAF2RH7MUBNY3VQI

not attested not anchored not stored refs pending

Time-Resolved Upconversion of Entangled Photon Pairs

Alfred B. U'Ren, Kevin A. O'Donnell

arxiv:0909.2007 v1 · 2009-09-10 · 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{SPMC3GESJAQAF2RH7MUBNY3VQI}

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	2026-05-18T02:11:57.351888Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

93d82d9892482002ea27fb2816e37582025f208d9921e7c4890ebbdfab676b2e

Aliases

arxiv: 0909.2007 · arxiv_version: 0909.2007v1 · doi: 10.48550/arxiv.0909.2007 · pith_short_12: SPMC3GESJAQA · pith_short_16: SPMC3GESJAQAF2RH · pith_short_8: SPMC3GES

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/SPMC3GESJAQAF2RH7MUBNY3VQI \
  | 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: 93d82d9892482002ea27fb2816e37582025f208d9921e7c4890ebbdfab676b2e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e76d71b8e5b0cdcbf39e54983687d208a3773bd0abc3e200d5f4f8c3215810ca",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2009-09-10T18:03:29Z",
    "title_canon_sha256": "947a011d76986f60a63fcb742b89f27fde4b52b6e4c61acce40301412961948d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0909.2007",
    "kind": "arxiv",
    "version": 1
  }
}