Pith Number

pith:K2WHJQOA

pith:2008:K2WHJQOA2LGFUFTWK5G5AWOGYD

not attested not anchored not stored refs pending

In situ accurate determination of the zero time delay between two independent ultrashort laser pulses by observing the oscillation of an atomic excited wave packet

John W. Hepburn, Qun Zhang

arxiv:0806.2741 v4 · 2008-06-17 · physics.optics · physics.atom-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{K2WHJQOA2LGFUFTWK5G5AWOGYD}

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	2026-07-04T17:11:18.471156Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

56ac74c1c0d2cc5a1676574dd059c6c0ec1b37d8ae64738ba1107767c8e43b2d

Aliases

arxiv: 0806.2741 · arxiv_version: 0806.2741v4 · doi: 10.48550/arxiv.0806.2741 · pith_short_12: K2WHJQOA2LGF · pith_short_16: K2WHJQOA2LGFUFTW · pith_short_8: K2WHJQOA

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/K2WHJQOA2LGFUFTWK5G5AWOGYD \
  | 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: 56ac74c1c0d2cc5a1676574dd059c6c0ec1b37d8ae64738ba1107767c8e43b2d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "664a51f4b6962d461a2e48b894c5496763a624e85616f8528131edbcf378c965",
    "cross_cats_sorted": [
      "physics.atom-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.optics",
    "submitted_at": "2008-06-17T09:54:30Z",
    "title_canon_sha256": "b71c4dac067b0b3d5c342a4e7f961c22e28eb75a37f886775bc1948dfea3f727"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0806.2741",
    "kind": "arxiv",
    "version": 4
  }
}