Pith Number

pith:EXDDUDWH

pith:2020:EXDDUDWHFDLCKK2LM7TPVB5AP6

not attested not anchored not stored refs pending

Orbital angular momentum beam generation using a free-electron laser oscillator

Andrei Afanasev, Hao Hao, Jun Yan, Peifan Liu, Stepan F. Mikhailov, Stephen V. Benson, Victor G. Popov, Ying K. Wu

arxiv:2007.15723 v1 · 2020-07-30 · physics.acc-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{EXDDUDWHFDLCKK2LM7TPVB5AP6}

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	2026-07-05T01:23:37.669187Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

25c63a0ec728d6252b4b67e6fa87a07fa47d434ccff3b2f90e566ed838b99fa1

Aliases

arxiv: 2007.15723 · arxiv_version: 2007.15723v1 · doi: 10.48550/arxiv.2007.15723 · pith_short_12: EXDDUDWHFDLC · pith_short_16: EXDDUDWHFDLCKK2L · pith_short_8: EXDDUDWH

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/EXDDUDWHFDLCKK2LM7TPVB5AP6 \
  | 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: 25c63a0ec728d6252b4b67e6fa87a07fa47d434ccff3b2f90e566ed838b99fa1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b7faa3e4c4be528e58fd9ed707a6a6471916c5aaaa202b7328bfc1a3552c6900",
    "cross_cats_sorted": [
      "physics.optics"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.acc-ph",
    "submitted_at": "2020-07-30T20:11:04Z",
    "title_canon_sha256": "e9b7629eac28daca5d4b374c37d511652ed1c8f00017ba5fea407917baaf3120"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2007.15723",
    "kind": "arxiv",
    "version": 1
  }
}