Pith Number

pith:FBZFCCBU

pith:2026:FBZFCCBUA3MLL4MFZKOQG6P6QZ

not attested not anchored not stored refs pending

Heisenberg scaling in optical magnetometry with measurement-induced correlations as a quantum resource

Georg Engelhardt, J.F. Chen, Junyan Luo, Ming Li, Xingchang Wang

arxiv:2601.01820 v2 · 2026-01-05 · 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{FBZFCCBUA3MLL4MFZKOQG6P6QZ}

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	2026-07-27T00:19:45.837027Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

287251083406d8b5f185ca9d0379fe8661582f9fd1fb4e74b3f8974c9a52b55a

Aliases

arxiv: 2601.01820 · arxiv_version: 2601.01820v2 · doi: 10.48550/arxiv.2601.01820 · pith_short_12: FBZFCCBUA3ML · pith_short_16: FBZFCCBUA3MLL4MF · pith_short_8: FBZFCCBU

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/FBZFCCBUA3MLL4MFZKOQG6P6QZ \
  | 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: 287251083406d8b5f185ca9d0379fe8661582f9fd1fb4e74b3f8974c9a52b55a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "18267f502d4959b2a51c5deb17504a920772e78dd3f89fcd4fd590337c52adb6",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2026-01-05T06:23:31Z",
    "title_canon_sha256": "913e91278b9fd0104810d9779060e86bfd13d16dec7fa5cb8b6d759bbead5ae4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2601.01820",
    "kind": "arxiv",
    "version": 2
  }
}