Pith Number

pith:QYNL2PIL

pith:2011:QYNL2PILSMRWD36UNYV43FIR26

not attested not anchored not stored refs pending

Directional free-space coupling from photonic crystal waveguides

Cheng-Chia Tsai, Dirk Englund, Jacob Mower

arxiv:1109.4469 v1 · 2011-09-21 · 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{QYNL2PILSMRWD36UNYV43FIR26}

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	2026-05-18T02:00:27.332420Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

861abd3d0b932361efd46e2bcd9511d7b5e599d11874cd650644d579be032361

Aliases

arxiv: 1109.4469 · arxiv_version: 1109.4469v1 · doi: 10.48550/arxiv.1109.4469 · pith_short_12: QYNL2PILSMRW · pith_short_16: QYNL2PILSMRWD36U · pith_short_8: QYNL2PIL

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/QYNL2PILSMRWD36UNYV43FIR26 \
  | 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: 861abd3d0b932361efd46e2bcd9511d7b5e599d11874cd650644d579be032361

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "fe78215506f7dc51a6ab209253166ddd41ea0c1164db0f46510f93ccb510da03",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.optics",
    "submitted_at": "2011-09-21T03:40:17Z",
    "title_canon_sha256": "dd716df3bc989bbf806989e61106e015fc3443bb2d7b3847e5858a990b0639f5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1109.4469",
    "kind": "arxiv",
    "version": 1
  }
}