Pith Number

pith:HQRXWXVD

pith:2012:HQRXWXVDCPEHJW7O6UTBJACP6P

not attested not anchored not stored refs pending

GaN directional couplers for integrated quantum photonics

Erdan Gu, Erman Engin, Ian M. Watson, Jeremy L. O'Brien, Loyd McKnight, Mark G. Thompson, Martin D. Dawson, Martin J. Cryan, Stephane Calvez, Yanfeng Zhang

arxiv:1202.4313 v1 · 2012-02-20 · physics.optics · cond-mat.mtrl-sci · 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{HQRXWXVDCPEHJW7O6UTBJACP6P}

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	2026-05-18T04:01:51.780961Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3c237b5ea313c874dbeef52614804ff3cda11d780bdb4e73e44af3caf17386db

Aliases

arxiv: 1202.4313 · arxiv_version: 1202.4313v1 · doi: 10.48550/arxiv.1202.4313 · pith_short_12: HQRXWXVDCPEH · pith_short_16: HQRXWXVDCPEHJW7O · pith_short_8: HQRXWXVD

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/HQRXWXVDCPEHJW7O6UTBJACP6P \
  | 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: 3c237b5ea313c874dbeef52614804ff3cda11d780bdb4e73e44af3caf17386db

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "22f9d61f66bc70ec34f67058944746b7238e539788606f6bc4e9a8b4eb2f7733",
    "cross_cats_sorted": [
      "cond-mat.mtrl-sci",
      "quant-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.optics",
    "submitted_at": "2012-02-20T13:04:57Z",
    "title_canon_sha256": "b35ddb72ff6914cbd00040ba2cefb815d1cb1f9f9c652c99778287aa56ab1c7b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1202.4313",
    "kind": "arxiv",
    "version": 1
  }
}