Pith Number

pith:LMI3FUSZ

pith:2013:LMI3FUSZVTQFH7VT3DKKPPZVUC

not attested not anchored not stored refs pending

Effects of crystal length on the angular spectrum of spontaneous parametric downconversion photon pairs

Alfred B. U'Ren, Hector Cruz-Ramirez, Roberto Ramirez-Alarcon

arxiv:1306.4903 v1 · 2013-06-20 · quant-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{LMI3FUSZVTQFH7VT3DKKPPZVUC}

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	2026-05-18T03:20:21.203153Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5b11b2d259ace053feb3d8d4a7bf35a0b8d738dc873c7f40e8694f75f0db31e6

Aliases

arxiv: 1306.4903 · arxiv_version: 1306.4903v1 · doi: 10.48550/arxiv.1306.4903 · pith_short_12: LMI3FUSZVTQF · pith_short_16: LMI3FUSZVTQFH7VT · pith_short_8: LMI3FUSZ

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/LMI3FUSZVTQFH7VT3DKKPPZVUC \
  | 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: 5b11b2d259ace053feb3d8d4a7bf35a0b8d738dc873c7f40e8694f75f0db31e6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7f283695f9a3f76d725b9ade54a9618372b2b373fd94d0eb266a6ca3f6dd029c",
    "cross_cats_sorted": [
      "physics.optics"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2013-06-20T15:16:53Z",
    "title_canon_sha256": "2d73ca9d8b82b3cc31d659dd8cf8d9d5011cdabb38ca37c3fecbf850c5178abd"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1306.4903",
    "kind": "arxiv",
    "version": 1
  }
}