Pith Number

pith:6ZVPJDGS

pith:2007:6ZVPJDGSZS5ZA2NWUND72XSG4J

not attested not anchored not stored refs pending

Quantum key distribution over 40 dB channel loss using superconducting single photon detectors

Hiroki Takesue, Kiyoshi Tamaki, Qiang Zhang, Robert H. Hadfield, Sae Woo Nam, Toshimori Honjo, Yoshihisa Yamamoto

arxiv:0706.0397 v1 · 2007-06-04 · 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{6ZVPJDGSZS5ZA2NWUND72XSG4J}

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	2026-05-18T02:16:30.450310Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f66af48cd2ccbb9069b6a347fd5e46e2407da24aa0e54a645624a660558b8bc1

Aliases

arxiv: 0706.0397 · arxiv_version: 0706.0397v1 · doi: 10.48550/arxiv.0706.0397 · pith_short_12: 6ZVPJDGSZS5Z · pith_short_16: 6ZVPJDGSZS5ZA2NW · pith_short_8: 6ZVPJDGS

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/6ZVPJDGSZS5ZA2NWUND72XSG4J \
  | 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: f66af48cd2ccbb9069b6a347fd5e46e2407da24aa0e54a645624a660558b8bc1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9ab69eeafaf8c52fdba7bbc1d24455c631573177d86d8a25f3b77545c3360b9b",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "quant-ph",
    "submitted_at": "2007-06-04T09:07:01Z",
    "title_canon_sha256": "1867eb99392c5c5ccd7edc6ac93a4c8fdd313b8948b3d5b6c36de348c2492840"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0706.0397",
    "kind": "arxiv",
    "version": 1
  }
}