Pith Number

pith:OHPF6ERZ

pith:1997:OHPF6ERZM6MBFKVV3ZJH65DXHX

not attested not anchored not stored refs pending

Optical von Neumann measurement

G. M. D'Ariano, Italy), M. F. Sacchi (Dipartimento di Fisica 'Alessandro Volta', Pavia

arxiv:quant-ph/9705021 v1 · 1997-05-12 · 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{OHPF6ERZM6MBFKVV3ZJH65DXHX}

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	2026-07-04T16:06:29.378222Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

71de5f1239679812aab5de527f74773dd682cc030328f091882fe43e3b4dd36d

Aliases

arxiv: quant-ph/9705021 · arxiv_version: quant-ph/9705021v1 · doi: 10.48550/arxiv.quant-ph/9705021 · pith_short_12: OHPF6ERZM6MB · pith_short_16: OHPF6ERZM6MBFKVV · pith_short_8: OHPF6ERZ

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/OHPF6ERZM6MBFKVV3ZJH65DXHX \
  | 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: 71de5f1239679812aab5de527f74773dd682cc030328f091882fe43e3b4dd36d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6043d2ad3ef98a8ccdd4dcca8bd3ee7d85ace99766aa625648b4a6a047fef1ba",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "quant-ph",
    "submitted_at": "1997-05-12T14:10:44Z",
    "title_canon_sha256": "dcb4f74022a9fb6f7bc1691ad67ed3af615472b5de7a858105cbad546df48708"
  },
  "schema_version": "1.0",
  "source": {
    "id": "quant-ph/9705021",
    "kind": "arxiv",
    "version": 1
  }
}