Pith Number

pith:FIT6NKOI

pith:2020:FIT6NKOI3RKNTL3UB4LSNJ7NUC

not attested not anchored not stored refs pending

Quantum Fisher information measurement and verification of the quantum Cram\'er-Rao bound in a solid-state qubit

Haibin Liu, Jianming Cai, Markus Heyl, Min Yu, Musang Gong, Nathan Goldman, Pengcheng Yang, Qingyun Cao, Shaoliang Zhang, Tomoki Ozawa, Yu Liu

arxiv:2003.08373 v3 · 2020-03-18 · 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{FIT6NKOI3RKNTL3UB4LSNJ7NUC}

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

Leggett-Garg Inequality Violations Bound Quantum Fisher Information

Receipt and verification

First computed	2026-07-05T04:22:36.578577Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2a27e6a9c8dc54d9af740f1726a7eda0a2d7dd5d9a253f37c8c478e8f7c70db8

Aliases

arxiv: 2003.08373 · arxiv_version: 2003.08373v3 · doi: 10.48550/arxiv.2003.08373 · pith_short_12: FIT6NKOI3RKN · pith_short_16: FIT6NKOI3RKNTL3U · pith_short_8: FIT6NKOI

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/FIT6NKOI3RKNTL3UB4LSNJ7NUC \
  | 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: 2a27e6a9c8dc54d9af740f1726a7eda0a2d7dd5d9a253f37c8c478e8f7c70db8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e5c5689f861946490edf00c187d019777adf3abe759136d1207c8d2920535e6a",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2020-03-18T17:51:06Z",
    "title_canon_sha256": "bac61ef20b5299e306e2bd414b16584ca263f3106056fb4d25b74a1d8c00f81f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2003.08373",
    "kind": "arxiv",
    "version": 3
  }
}