Pith Number

pith:5IM5KHOF

pith:2016:5IM5KHOFIYKCMUBTTVNTVIAJWO

not attested not anchored not stored refs pending

Quantum field theory and classical optics: determining the fine structure constant

Gerd Leuchs, Luis L. Sanchez-Soto, Margaret Hawton

arxiv:1612.03394 v1 · 2016-12-11 · 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{5IM5KHOFIYKCMUBTTVNTVIAJWO}

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	2026-05-18T00:49:10.818302Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ea19d51dc546142650339d5b3aa009b3ae13d50424f22db3de73212eb6687dd4

Aliases

arxiv: 1612.03394 · arxiv_version: 1612.03394v1 · doi: 10.48550/arxiv.1612.03394 · pith_short_12: 5IM5KHOFIYKC · pith_short_16: 5IM5KHOFIYKCMUBT · pith_short_8: 5IM5KHOF

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/5IM5KHOFIYKCMUBTTVNTVIAJWO \
  | 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: ea19d51dc546142650339d5b3aa009b3ae13d50424f22db3de73212eb6687dd4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6d6e1264ebcde48eaf95eb72a637ca64562deff14be6352df580858f8db1ce33",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2016-12-11T09:30:10Z",
    "title_canon_sha256": "b5820b83dbb87f9191fcbda57779487abc49bdf2d08061574232a2ebc026cd1f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1612.03394",
    "kind": "arxiv",
    "version": 1
  }
}