Pith Number

pith:YCWUBU5J

pith:2008:YCWUBU5JYE4ELHCKRADPMSET5Z

not attested not anchored not stored refs pending

Natural Metric for Quantum Information Theory

J. Sparacino, M. Portesi, P.W. Lamberti

arxiv:0807.0583 v2 · 2008-07-03 · 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{YCWUBU5JYE4ELHCKRADPMSET5Z}

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	2026-05-18T04:05:47.753678Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c0ad40d3a9c138459c4a8806f64893ee7521b3cc915705122e1137360a818d7b

Aliases

arxiv: 0807.0583 · arxiv_version: 0807.0583v2 · doi: 10.48550/arxiv.0807.0583 · pith_short_12: YCWUBU5JYE4E · pith_short_16: YCWUBU5JYE4ELHCK · pith_short_8: YCWUBU5J

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/YCWUBU5JYE4ELHCKRADPMSET5Z \
  | 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: c0ad40d3a9c138459c4a8806f64893ee7521b3cc915705122e1137360a818d7b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2558e0fe54105e36bc6c43125f198e7ac80b0e87c15aebaea4c365cdbc9435fb",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2008-07-03T15:30:19Z",
    "title_canon_sha256": "0e9ad9cc1cd8c88bede6bdbc02a03d70bb2a16957f6b67f28f932c44ba513ab2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0807.0583",
    "kind": "arxiv",
    "version": 2
  }
}