Pith Number

pith:LUNY42WE

pith:2021:LUNY42WE2GLL2VK3MQ3FWI43MD

not attested not anchored not stored refs pending

Improved absolute clock stability by the joint interrogation of two atomic states

Augusto Smerzi, Luca Pezz\`e, Shuyuan Wu, Weidong Li

arxiv:2104.14309 v1 · 2021-04-29 · 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{LUNY42WE2GLL2VK3MQ3FWI43MD}

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	2026-07-05T04:27:42.400886Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5d1b8e6ac4d196bd555b64365b239b60f4eb15f15aa926b214cdefd32058a001

Aliases

arxiv: 2104.14309 · arxiv_version: 2104.14309v1 · doi: 10.48550/arxiv.2104.14309 · pith_short_12: LUNY42WE2GLL · pith_short_16: LUNY42WE2GLL2VK3 · pith_short_8: LUNY42WE

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/LUNY42WE2GLL2VK3MQ3FWI43MD \
  | 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: 5d1b8e6ac4d196bd555b64365b239b60f4eb15f15aa926b214cdefd32058a001

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "65f919297e18c98b7aa303370a1a34c8bb74d79eb1be26e7d134427268f298d4",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2021-04-29T12:50:28Z",
    "title_canon_sha256": "d307faa30b052617548b817681fa9726600ba7f1f4f96f5cfcc60e67db8df57c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2104.14309",
    "kind": "arxiv",
    "version": 1
  }
}