Pith Number

pith:ITD4IBUC

pith:2001:ITD4IBUCGVKWZHU4V52IFJNFDL

not attested not anchored not stored refs pending

Extending the Fisher metric to density matrices

Cs. Sudar, D. Petz

arxiv:quant-ph/0102132 v1 · 2001-02-27 · 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{ITD4IBUCGVKWZHU4V52IFJNFDL}

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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.

Cited by

1 paper in Pith

A Sharp Geometric Measure of Entanglement

Receipt and verification

First computed	2026-07-04T14:45:36.071819Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

44c7c4068235556c9e9caf7482a5a51af9bd2b6e24c395906fe51a71575260e0

Aliases

arxiv: quant-ph/0102132 · arxiv_version: quant-ph/0102132v1 · doi: 10.48550/arxiv.quant-ph/0102132 · pith_short_12: ITD4IBUCGVKW · pith_short_16: ITD4IBUCGVKWZHU4 · pith_short_8: ITD4IBUC

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/ITD4IBUCGVKWZHU4V52IFJNFDL \
  | 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: 44c7c4068235556c9e9caf7482a5a51af9bd2b6e24c395906fe51a71575260e0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6d413573482038efad958cad49f25ba1569d67abdee9aca36b11a4473553607f",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "quant-ph",
    "submitted_at": "2001-02-27T07:07:56Z",
    "title_canon_sha256": "12bd1c15cc0f387f84d825eec3974d19276458e967f1f6753298cfa52dfe9dc8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "quant-ph/0102132",
    "kind": "arxiv",
    "version": 1
  }
}