Pith Number

pith:GY2X5A4E

pith:2015:GY2X5A4EDCD4EXSFF2P5X5LPRD

not attested not anchored not stored refs pending

Heisenberg scaling in Gaussian quantum metrology

Ivette Fuentes, Michalis Skotiniotis, Nicolai Friis, Wolfgang D\"ur

arxiv:1502.07654 v2 · 2015-02-26 · quant-ph · gr-qc

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{GY2X5A4EDCD4EXSFF2P5X5LPRD}

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	2026-05-18T01:35:39.888950Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

36357e83841887c25e452e9fdbf56f88cdce38afccae83a5ee5b0e4322e7aba1

Aliases

arxiv: 1502.07654 · arxiv_version: 1502.07654v2 · doi: 10.48550/arxiv.1502.07654 · pith_short_12: GY2X5A4EDCD4 · pith_short_16: GY2X5A4EDCD4EXSF · pith_short_8: GY2X5A4E

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/GY2X5A4EDCD4EXSFF2P5X5LPRD \
  | 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: 36357e83841887c25e452e9fdbf56f88cdce38afccae83a5ee5b0e4322e7aba1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4f4c6716085d801d9f64385dd038c3c6b3272eef414660f68ab8e6c34d5bb637",
    "cross_cats_sorted": [
      "gr-qc"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2015-02-26T18:08:19Z",
    "title_canon_sha256": "affa0740aad215e5b0f3bab59e48f861beb796944a6f627a783889fc4965fe60"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1502.07654",
    "kind": "arxiv",
    "version": 2
  }
}