Pith Number

pith:E6E4L6FP

pith:2026:E6E4L6FPJ5KPDNJRRW3KKS6L3L

not attested not anchored not stored refs pending

Laser fractional frequency instability at $\mathbf{4\times 10^{-17}}$ with a room temperature optical reference cavity

Adam L. Parke, Eve Clulow, Henry Bourne, Jacob Tunesi, Jacques-Olivier Gaudron, Marco Schioppo, Matias Risaro, Namneet Kaur, Reinhard Karembera, Wei Huang, Xi Zhang

arxiv:2606.05987 v1 · 2026-06-04 · physics.optics · 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{E6E4L6FPJ5KPDNJRRW3KKS6L3L}

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	2026-06-05T01:15:29.680845Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2789c5f8af4f54f1b5318db6a54bcbdaf6d5a9ef0bcb9e86fb50d8d05067ce53

Aliases

arxiv: 2606.05987 · arxiv_version: 2606.05987v1 · doi: 10.48550/arxiv.2606.05987 · pith_short_12: E6E4L6FPJ5KP · pith_short_16: E6E4L6FPJ5KPDNJR · pith_short_8: E6E4L6FP

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/E6E4L6FPJ5KPDNJRRW3KKS6L3L \
  | 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: 2789c5f8af4f54f1b5318db6a54bcbdaf6d5a9ef0bcb9e86fb50d8d05067ce53

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b298c16d7a7295db3b212ef81ac06cb21894a8d1517a1cdd375ca2a3908222ea",
    "cross_cats_sorted": [
      "physics.atom-ph"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "physics.optics",
    "submitted_at": "2026-06-04T10:30:29Z",
    "title_canon_sha256": "5843de7a75b2b55670266aebd1127cc92e87385789fd2b2d93d06a5509c2bd4d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2606.05987",
    "kind": "arxiv",
    "version": 1
  }
}