Pith Number

pith:BQNSRYWU

pith:2000:BQNSRYWUBP32O27H2BKTONBL2F

not attested not anchored not stored refs pending

Quantum state protection using all-optical feedback

David Vitali, Paolo Tombesi, Vittorio Giovannetti

arxiv:quant-ph/0004027 v1 · 2000-04-06 · 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{BQNSRYWUBP32O27H2BKTONBL2F}

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	2026-07-05T04:59:36.282220Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0c1b28e2d40bf7a76be7d05537342bd15506576792443d5aff65f66e4eff2b6e

Aliases

arxiv: quant-ph/0004027 · arxiv_version: quant-ph/0004027v1 · doi: 10.48550/arxiv.quant-ph/0004027 · pith_short_12: BQNSRYWUBP32 · pith_short_16: BQNSRYWUBP32O27H · pith_short_8: BQNSRYWU

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/BQNSRYWUBP32O27H2BKTONBL2F \
  | 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: 0c1b28e2d40bf7a76be7d05537342bd15506576792443d5aff65f66e4eff2b6e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "da3cb80885c7dc754154fccb1faa2843bd96667f165eda888771b3319cdf0823",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "quant-ph",
    "submitted_at": "2000-04-06T15:19:00Z",
    "title_canon_sha256": "293bb4dc9ee0c42717dc63c7bae8925c9d0cd955672c135b436cdb48418f8095"
  },
  "schema_version": "1.0",
  "source": {
    "id": "quant-ph/0004027",
    "kind": "arxiv",
    "version": 1
  }
}