Pith Number

pith:YW4XVKNX

pith:2009:YW4XVKNXGG3QWTBLPKWF6TCG6P

not attested not anchored not stored refs pending

Quantum repeaters free of polarization disturbance and phase noise

Guang-Can Guo, Yi-bo Zhao, Yong Yang, Zheng-Fu Han, Zhen-Qiang Yin

arxiv:0902.4498 v1 · 2009-02-26 · 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{YW4XVKNXGG3QWTBLPKWF6TCG6P}

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	2026-07-04T15:40:44.487008Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c5b97aa9b731b70b4c2b7aac5f4c46f3d35ce1eb528fa65aaa1ea39d5e7ea5ca

Aliases

arxiv: 0902.4498 · arxiv_version: 0902.4498v1 · doi: 10.48550/arxiv.0902.4498 · pith_short_12: YW4XVKNXGG3Q · pith_short_16: YW4XVKNXGG3QWTBL · pith_short_8: YW4XVKNX

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/YW4XVKNXGG3QWTBLPKWF6TCG6P \
  | 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: c5b97aa9b731b70b4c2b7aac5f4c46f3d35ce1eb528fa65aaa1ea39d5e7ea5ca

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ff076462ff72ea1ca15fc817bf57915e21ca81f4cf21548bf055168a2a4cad8e",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2009-02-26T02:18:25Z",
    "title_canon_sha256": "2e7c98de129f9646eada77dd395841ab634d796667745a65c1be32be7c865ca4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0902.4498",
    "kind": "arxiv",
    "version": 1
  }
}