Pith Number

pith:B2LVRQTZ

pith:2008:B2LVRQTZEEZXKWCFDEWXDNQFTU

not attested not anchored not stored refs pending

Entropic uncertainties for joint quantum measurements

Erika Andersson, Stephen M Barnett, Thomas Brougham

arxiv:0812.1474 v2 · 2008-12-08 · 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{B2LVRQTZEEZXKWCFDEWXDNQFTU}

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	2026-05-18T02:15:11.440329Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0e9758c2792133755845192d71b6059d0ab51479d5b1440776a8b69a3865e979

Aliases

arxiv: 0812.1474 · arxiv_version: 0812.1474v2 · doi: 10.48550/arxiv.0812.1474 · pith_short_12: B2LVRQTZEEZX · pith_short_16: B2LVRQTZEEZXKWCF · pith_short_8: B2LVRQTZ

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/B2LVRQTZEEZXKWCFDEWXDNQFTU \
  | 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: 0e9758c2792133755845192d71b6059d0ab51479d5b1440776a8b69a3865e979

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2d0ce4cc17ff1d0e7dcf4bdaba333e19ecebf446c316b5318c10e5283baa6fa1",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2008-12-08T11:58:18Z",
    "title_canon_sha256": "eb76aa48efa4e79902a2ad492affa3aada80dbe3b6d047711a6a70968133bd94"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0812.1474",
    "kind": "arxiv",
    "version": 2
  }
}