Pith Number

pith:LUMLZBSQ

pith:2016:LUMLZBSQ2KE3V2UAYR2WMDARB5

not attested not anchored not stored refs pending

Noisy Metrology: A saturable lower bound on quantum Fisher information

A. S. Khorashad, R. Yousefjani, S. Salimi

arxiv:1602.01691 v5 · 2016-02-04 · 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{LUMLZBSQ2KE3V2UAYR2WMDARB5}

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	2026-05-18T00:45:08.451941Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5d18bc8650d289baea80c475660c110f763b2c7ce8ad99dd191ca9ba10d2306b

Aliases

arxiv: 1602.01691 · arxiv_version: 1602.01691v5 · doi: 10.48550/arxiv.1602.01691 · pith_short_12: LUMLZBSQ2KE3 · pith_short_16: LUMLZBSQ2KE3V2UA · pith_short_8: LUMLZBSQ

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/LUMLZBSQ2KE3V2UAYR2WMDARB5 \
  | 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: 5d18bc8650d289baea80c475660c110f763b2c7ce8ad99dd191ca9ba10d2306b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "08f5871e801325f641e3f384578f48c104e7d35753eb114981a2a54b5366dd38",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2016-02-04T14:34:48Z",
    "title_canon_sha256": "e54accc186a0c73a80195a1e9144aa6d10c92073663249084d1af0186f53ec10"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1602.01691",
    "kind": "arxiv",
    "version": 5
  }
}