Pith Number

pith:VDMPR4YT

pith:2025:VDMPR4YTI2RGXJ3L6SPJV63WPZ

not attested not anchored not stored refs pending

Optical clock based on two-photon spectroscopy of the nuclear transition in ion $^{229}$Th in a monochromatic field

A. N. Goncharov, A. V. Taichenachev, M. Yu. Basalaev, O. N. Prudnikov, S. V. Chepurov, V. G. Pal'chikov, V. I. Yudin

arxiv:2501.15669 v4 · 2025-01-26 · physics.atom-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{VDMPR4YTI2RGXJ3L6SPJV63WPZ}

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	2026-07-05T10:52:57.932880Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a8d8f8f31346a26ba76bf49e9afb767e4beeeaf8f58b6d41f622bfb4308dbbda

Aliases

arxiv: 2501.15669 · arxiv_version: 2501.15669v4 · doi: 10.48550/arxiv.2501.15669 · pith_short_12: VDMPR4YTI2RG · pith_short_16: VDMPR4YTI2RGXJ3L · pith_short_8: VDMPR4YT

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/VDMPR4YTI2RGXJ3L6SPJV63WPZ \
  | 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: a8d8f8f31346a26ba76bf49e9afb767e4beeeaf8f58b6d41f622bfb4308dbbda

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a90228bcf69122f307e859c7bfa98f5a33b20bfa4a8424a9dafbffee5cf851e0",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "physics.atom-ph",
    "submitted_at": "2025-01-26T20:46:19Z",
    "title_canon_sha256": "be1809342bd6de0190e8df74df8e39b88c7889c38e48a3831b1422337c216087"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2501.15669",
    "kind": "arxiv",
    "version": 4
  }
}