Pith Number

pith:4MF44KXR

pith:2026:4MF44KXRKE65BM55R3Y3SPSRLR

not attested not anchored not stored refs pending

Coincidence free certification and quantification of spatial entanglement with stimulated parametric down conversion

G. H. dos Santos, M. G. Damaceno, N. Rubiano da Silva, P. H. Souto Ribeiro, S. P. Walborn

arxiv:2607.24718 v1 · 2026-07-27 · quant-ph · physics.optics

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{4MF44KXRKE65BM55R3Y3SPSRLR}

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	2026-07-28T02:24:24.003711Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e30bce2af1513dd0b3bd8ef1b93e515c51b72cc6f6c390d3923cb5dda9399ea6

Aliases

arxiv: 2607.24718 · arxiv_version: 2607.24718v1 · doi: 10.48550/arxiv.2607.24718 · pith_short_12: 4MF44KXRKE65 · pith_short_16: 4MF44KXRKE65BM55 · pith_short_8: 4MF44KXR

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/4MF44KXRKE65BM55R3Y3SPSRLR \
  | 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: e30bce2af1513dd0b3bd8ef1b93e515c51b72cc6f6c390d3923cb5dda9399ea6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d08ed7a4b698946a62d8e8c05efd52b9c7576e6ab3a1154a849b875f9db2d898",
    "cross_cats_sorted": [
      "physics.optics"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2026-07-27T17:54:15Z",
    "title_canon_sha256": "7f3c0ffdaf8dd3a46c890f98682a0d454ef1683d56c8ab44fe518d7b49a680d7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2607.24718",
    "kind": "arxiv",
    "version": 1
  }
}