Pith Number

pith:VSG7VCWW

pith:2009:VSG7VCWWR5JUSWRFJKPTSJUAG5

not attested not anchored not stored refs pending

High rate, long-distance quantum key distribution over 250km of ultra low loss fibres

C. R. Towery, D. Stucki, F. Vannel, H. Zbinden, N. Gisin, N. Walenta, R. T. Thew, S. Gray, S. Ten

arxiv:0903.3907 v1 · 2009-03-23 · 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{VSG7VCWWR5JUSWRFJKPTSJUAG5}

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	2026-05-18T03:59:37.073639Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ac8dfa8ad68f53495a254a9f392680374d79a868dca7bb28b29d086302c133fb

Aliases

arxiv: 0903.3907 · arxiv_version: 0903.3907v1 · doi: 10.48550/arxiv.0903.3907 · pith_short_12: VSG7VCWWR5JU · pith_short_16: VSG7VCWWR5JUSWRF · pith_short_8: VSG7VCWW

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/VSG7VCWWR5JUSWRFJKPTSJUAG5 \
  | 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: ac8dfa8ad68f53495a254a9f392680374d79a868dca7bb28b29d086302c133fb

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "019d14cbb576276cb9af56a79e06a79683767f30701b5a45cf3125a10840aef6",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2009-03-23T17:16:51Z",
    "title_canon_sha256": "0d2d4f786185db09ef4c844e7f81215cdf942364e0a4588d1fb126888cd4bc96"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0903.3907",
    "kind": "arxiv",
    "version": 1
  }
}