Pith Number

pith:MM6VE6OW

pith:2021:MM6VE6OW64MMPLKQD2PBQOT3SM

not attested not anchored not stored refs pending

Analog FM free-space optical communication based on a mid-infrared quantum cascade laser frequency comb

Francesco Cappelli, Luigi Consolino, Nicola Corrias, Paolo De Natale, Tecla Gabbrielli

arxiv:2109.09465 v1 · 2021-09-14 · physics.app-ph · physics.optics

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{MM6VE6OW64MMPLKQD2PBQOT3SM}

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	2026-07-05T04:11:48.937807Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

633d5279d6f718c7ad501e9e183a7b9334e323ccb6c7b14518f5c2367fd08779

Aliases

arxiv: 2109.09465 · arxiv_version: 2109.09465v1 · doi: 10.48550/arxiv.2109.09465 · pith_short_12: MM6VE6OW64MM · pith_short_16: MM6VE6OW64MMPLKQ · pith_short_8: MM6VE6OW

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/MM6VE6OW64MMPLKQD2PBQOT3SM \
  | 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: 633d5279d6f718c7ad501e9e183a7b9334e323ccb6c7b14518f5c2367fd08779

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "671dd0b93f7de831626ba5f9f00cc5f07d18f0bdc71bfc980dc381042ede03ad",
    "cross_cats_sorted": [
      "physics.optics"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "physics.app-ph",
    "submitted_at": "2021-09-14T16:42:05Z",
    "title_canon_sha256": "f8ae54fccddb28cae5c6792244ecbb3ebf9925af7af7f664010fe7a5c67df3fc"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2109.09465",
    "kind": "arxiv",
    "version": 1
  }
}