Pith Number

pith:CRFA3A5B

pith:2022:CRFA3A5B2KCDQEJIJWQT6GJCSP

not attested not anchored not stored refs pending

A Fisher information-based incompatibility criterion for quantum channels

Ion Nechita, Qing-Hua Zhang

arxiv:2204.09963 v1 · 2022-04-21 · quant-ph · math-ph · math.MP

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{CRFA3A5B2KCDQEJIJWQT6GJCSP}

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	2026-07-05T04:33:35.170090Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

144a0d83a1d2843811284da13f192293e6c233be185ac9a94f3e5b7e9bb3e338

Aliases

arxiv: 2204.09963 · arxiv_version: 2204.09963v1 · doi: 10.48550/arxiv.2204.09963 · pith_short_12: CRFA3A5B2KCD · pith_short_16: CRFA3A5B2KCDQEJI · pith_short_8: CRFA3A5B

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/CRFA3A5B2KCDQEJIJWQT6GJCSP \
  | 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: 144a0d83a1d2843811284da13f192293e6c233be185ac9a94f3e5b7e9bb3e338

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2261acba3769dc115bcac2eefc2ee122bc584fa37db86e0865371eaf8ac97a54",
    "cross_cats_sorted": [
      "math-ph",
      "math.MP"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2022-04-21T08:40:10Z",
    "title_canon_sha256": "da09ea7e3f0dc70ccb63687590797b6ff45c0dfd980c146ef9e53f1d82868bff"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2204.09963",
    "kind": "arxiv",
    "version": 1
  }
}