Pith Number

pith:UWVC6EUD

pith:2002:UWVC6EUDWVMECYDX4QAHPN2IA6

not attested not anchored not stored refs pending

On the effective size of certain "Schr\"{o}dinger cat'' like states

Christoph Simon, J. Ignacio Cirac, Wolfgang D\"ur

arxiv:quant-ph/0205099 v1 · 2002-05-16 · 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{UWVC6EUDWVMECYDX4QAHPN2IA6}

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	2026-05-18T01:08:59.534816Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a5aa2f1283b558416077e40077b74807a8649e4eddf183931857912a8f5d15cb

Aliases

arxiv: quant-ph/0205099 · arxiv_version: quant-ph/0205099v1 · doi: 10.48550/arxiv.quant-ph/0205099 · pith_short_12: UWVC6EUDWVME · pith_short_16: UWVC6EUDWVMECYDX · pith_short_8: UWVC6EUD

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/UWVC6EUDWVMECYDX4QAHPN2IA6 \
  | 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: a5aa2f1283b558416077e40077b74807a8649e4eddf183931857912a8f5d15cb

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "378674b3c314a8950a4507c04c064f5f0da64dafe933e6af41c69429a9cb25a3",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "quant-ph",
    "submitted_at": "2002-05-16T08:52:14Z",
    "title_canon_sha256": "6e0db4f29e60e88dde4567a64e1d0142dc518c9110c55e69335ef95e3cd3185b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "quant-ph/0205099",
    "kind": "arxiv",
    "version": 1
  }
}