Pith Number

pith:WC3F6LT5

pith:2004:WC3F6LT54YGOSY7UOLJ4JXLHZO

not attested not anchored not stored refs pending

Purification of Quantum State through Zeno-like Measurements

Hiromichi Nakazato, Kazuya Yuasa, Tomoko Takazawa

arxiv:quant-ph/0402183 v1 · 2004-02-25 · quant-ph

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

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	2026-05-18T00:17:13.886957Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b0b65f2e7de60ce963f472d3c4dd67cbae0c00af76e28dfc74542de829316be5

Aliases

arxiv: quant-ph/0402183 · arxiv_version: quant-ph/0402183v1 · doi: 10.48550/arxiv.quant-ph/0402183 · pith_short_12: WC3F6LT54YGO · pith_short_16: WC3F6LT54YGOSY7U · pith_short_8: WC3F6LT5

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/WC3F6LT54YGOSY7UOLJ4JXLHZO \
  | 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: b0b65f2e7de60ce963f472d3c4dd67cbae0c00af76e28dfc74542de829316be5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a23eef5f28128cc10dc8be8dcb1a2500f59673dc08622050b26f715b4da6f349",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "quant-ph",
    "submitted_at": "2004-02-25T07:55:03Z",
    "title_canon_sha256": "b1e3255e1132ebfc42fccda9b8e4380ddd840d80c78da833b8a4a8fa48256a3f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "quant-ph/0402183",
    "kind": "arxiv",
    "version": 1
  }
}