Pith Number

pith:W2KLSAXW

pith:2009:W2KLSAXWDDH6FI52GJWHO5D4C4

not attested not anchored not stored refs pending

Boosting up quantum key distribution by learning statistics of practical single photon sources

Masato Koashi, Nobuyuki Imoto, Takashi Yamamoto, Yoritoshi Adachi

arxiv:0909.5527 v2 · 2009-09-30 · 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{W2KLSAXWDDH6FI52GJWHO5D4C4}

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	2026-05-18T02:11:36.114183Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b694b902f618cfe2a3ba326c77747c173416442f96b988bb8ecc32309e9435dc

Aliases

arxiv: 0909.5527 · arxiv_version: 0909.5527v2 · doi: 10.48550/arxiv.0909.5527 · pith_short_12: W2KLSAXWDDH6 · pith_short_16: W2KLSAXWDDH6FI52 · pith_short_8: W2KLSAXW

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/W2KLSAXWDDH6FI52GJWHO5D4C4 \
  | 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: b694b902f618cfe2a3ba326c77747c173416442f96b988bb8ecc32309e9435dc

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9fed201c850ffd4f935dd96f9b344719850d957f8ce0ac92fc3e9ef45fce524d",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2009-09-30T07:06:56Z",
    "title_canon_sha256": "b3683cb54e148e49f8ddf1ac880d26c7aaa5fd7b9bc2f40aaf1789f3db4c7bcc"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0909.5527",
    "kind": "arxiv",
    "version": 2
  }
}