Pith Number

pith:6PG6BQTH

pith:2002:6PG6BQTHGP6J2P67IBFGVC52AI

not attested not anchored not stored refs pending

An entanglement measure based on the capacity of dense coding

Tohya Hiroshima

arxiv:quant-ph/0204086 v2 · 2002-04-16 · 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{6PG6BQTHGP6J2P67IBFGVC52AI}

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	2026-05-18T01:38:01.965824Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f3cde0c26733fc9d3fdf404a6a8bba022b9778ef3daa75ae7c86ec6ebb0265ba

Aliases

arxiv: quant-ph/0204086 · arxiv_version: quant-ph/0204086v2 · doi: 10.48550/arxiv.quant-ph/0204086 · pith_short_12: 6PG6BQTHGP6J · pith_short_16: 6PG6BQTHGP6J2P67 · pith_short_8: 6PG6BQTH

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/6PG6BQTHGP6J2P67IBFGVC52AI \
  | 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: f3cde0c26733fc9d3fdf404a6a8bba022b9778ef3daa75ae7c86ec6ebb0265ba

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e3e6158d23d38314cf5d1ca334341e1cdacbc221b67302db84861ed4c3cffd94",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "quant-ph",
    "submitted_at": "2002-04-16T02:39:10Z",
    "title_canon_sha256": "1b7abd827a8271bd35b76f1a0006b20f50166ccceab4e5cf31a7d37e1fe7aa22"
  },
  "schema_version": "1.0",
  "source": {
    "id": "quant-ph/0204086",
    "kind": "arxiv",
    "version": 2
  }
}