Pith Number

pith:J33WFY3W

pith:2022:J33WFY3WX7UV5UMTH7GVWJTZXB

not attested not anchored not stored refs pending

A geometric perspective: experimental evaluation of the quantum Cramer-Rao bound

Changhao Li, Mo Chen, Paola Cappellaro

arxiv:2204.13777 v2 · 2022-04-28 · quant-ph · physics.app-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{J33WFY3WX7UV5UMTH7GVWJTZXB}

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.

Cited by

1 paper in Pith

Measuring non-Abelian quantum geometry and topology in a multi-gap photonic lattice

Receipt and verification

First computed	2026-07-05T08:21:36.247373Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4ef762e376bfe95ed1933fcd5b2679b84c8f0ab17d10ffaa09a8af7b9015aa5b

Aliases

arxiv: 2204.13777 · arxiv_version: 2204.13777v2 · doi: 10.48550/arxiv.2204.13777 · pith_short_12: J33WFY3WX7UV · pith_short_16: J33WFY3WX7UV5UMT · pith_short_8: J33WFY3W

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/J33WFY3WX7UV5UMTH7GVWJTZXB \
  | 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: 4ef762e376bfe95ed1933fcd5b2679b84c8f0ab17d10ffaa09a8af7b9015aa5b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "670ea68bd7af087440b382b381316411206958981f6b2b8f907c6acbeb5f9fec",
    "cross_cats_sorted": [
      "physics.app-ph"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2022-04-28T20:58:33Z",
    "title_canon_sha256": "3954de2a1bfd9d59641a7abb2652aeef7113cebc4e9df901ff5089cc3fc81c33"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2204.13777",
    "kind": "arxiv",
    "version": 2
  }
}