Pith Number

pith:7BGZC2LX

pith:2004:7BGZC2LXVWBS3PDA7ZEI35PJYK

not attested not anchored not stored refs pending

Entanglement measure for general pure multipartite quantum states

Gunnar Bj\"ork, Hoshang Heydari

arxiv:quant-ph/0401129 v2 · 2004-01-21 · 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{7BGZC2LXVWBS3PDA7ZEI35PJYK}

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	2026-05-18T01:08:45.917274Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f84d916977ad832dbc60fe488df5e9c28bab8525e44d6eb2717f736c930ea4a2

Aliases

arxiv: quant-ph/0401129 · arxiv_version: quant-ph/0401129v2 · doi: 10.48550/arxiv.quant-ph/0401129 · pith_short_12: 7BGZC2LXVWBS · pith_short_16: 7BGZC2LXVWBS3PDA · pith_short_8: 7BGZC2LX

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/7BGZC2LXVWBS3PDA7ZEI35PJYK \
  | 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: f84d916977ad832dbc60fe488df5e9c28bab8525e44d6eb2717f736c930ea4a2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "42ef27733a3e4ec7eafafb2ff715959196367d8b248728056f6ee2d622096934",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "quant-ph",
    "submitted_at": "2004-01-21T14:13:06Z",
    "title_canon_sha256": "2656581ab6af23a460f2a9229ee753e7ec694a2226d635b0c7a80823254962a2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "quant-ph/0401129",
    "kind": "arxiv",
    "version": 2
  }
}