Pith Number

pith:4WVWZFMQ

pith:2018:4WVWZFMQFJH5LOJ6QOWTVFWUFG

not attested not anchored not stored refs pending

Sub-Hz Linewidth Photonic-Integrated Brillouin Laser

Daniel J. Blumenthal, Debapam Bose, Grant M. Brodnik, Peter T. Rakich, Ryan Behunin, Sarat Gundavarapu, Taran Huffman

arxiv:1802.10020 v1 · 2018-02-27 · 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{4WVWZFMQFJH5LOJ6QOWTVFWUFG}

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	2026-05-17T23:57:07.668761Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e5ab6c95902a4fd5b93e83ad3a96d429944f3097903875b8aa3be4e8f81e6ea8

Aliases

arxiv: 1802.10020 · arxiv_version: 1802.10020v1 · doi: 10.48550/arxiv.1802.10020 · pith_short_12: 4WVWZFMQFJH5 · pith_short_16: 4WVWZFMQFJH5LOJ6 · pith_short_8: 4WVWZFMQ

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/4WVWZFMQFJH5LOJ6QOWTVFWUFG \
  | 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: e5ab6c95902a4fd5b93e83ad3a96d429944f3097903875b8aa3be4e8f81e6ea8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9066f88b08381f94fb22f81a88a016860997a746d03b0ee0078d489dfd7d3110",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.optics",
    "submitted_at": "2018-02-27T16:51:37Z",
    "title_canon_sha256": "3864857d50fb4dda338ff0b3929ac0bdda9437e299eb838f0b9ca5922f565caa"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1802.10020",
    "kind": "arxiv",
    "version": 1
  }
}