Pith Number

pith:J3QW2JDS

pith:2021:J3QW2JDSCBFEUQX6AQG3N4QNPJ

not attested not anchored not stored refs pending

Fisher information universally identifies quantum resources

Bartosz Regula, Kok Chuan Tan, Varun Narasimhachar

arxiv:2104.01763 v1 · 2021-04-05 · 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{J3QW2JDSCBFEUQX6AQG3N4QNPJ}

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	2026-07-05T03:34:43.576637Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4ee16d2472104a4a42fe040db6f20d7a67e9e15eb2a379f399ab49a99f339e9d

Aliases

arxiv: 2104.01763 · arxiv_version: 2104.01763v1 · doi: 10.48550/arxiv.2104.01763 · pith_short_12: J3QW2JDSCBFE · pith_short_16: J3QW2JDSCBFEUQX6 · pith_short_8: J3QW2JDS

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/J3QW2JDSCBFEUQX6AQG3N4QNPJ \
  | 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: 4ee16d2472104a4a42fe040db6f20d7a67e9e15eb2a379f399ab49a99f339e9d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4b5983be8e83639d277fd4bcdf7b97a2c551da5db1c3b89f551d4f5031c98fa8",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2021-04-05T04:12:31Z",
    "title_canon_sha256": "adf0c05c0ad8816b297aefe6183c92ba51c8737bce125536155273b119ea06f5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2104.01763",
    "kind": "arxiv",
    "version": 1
  }
}