Pith Number

pith:4NWJPCXL

pith:2015:4NWJPCXLQMOUA6ZCTRD6DQB7UB

not attested not anchored not stored refs pending

Experimental demonstration of kilometer-range quantum digital signatures

Erika Andersson, Gerald Stuart Buller, John Jeffers, Klaudia Kleczkowska, Petros Wallden, Robert John Collins, Ross James Donaldson, Ryan Amiri, Vedran Dunjko

arxiv:1509.07827 v1 · 2015-09-25 · 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{4NWJPCXLQMOUA6ZCTRD6DQB7UB}

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	2026-05-18T01:21:54.061366Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e36c978aeb831d407b229c47e1c03fa04e2bf802e2bd89bd36e2059a999a46b4

Aliases

arxiv: 1509.07827 · arxiv_version: 1509.07827v1 · doi: 10.48550/arxiv.1509.07827 · pith_short_12: 4NWJPCXLQMOU · pith_short_16: 4NWJPCXLQMOUA6ZC · pith_short_8: 4NWJPCXL

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/4NWJPCXLQMOUA6ZCTRD6DQB7UB \
  | 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: e36c978aeb831d407b229c47e1c03fa04e2bf802e2bd89bd36e2059a999a46b4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "943af58d720f40cef25729fe6c1103f0448e80292b590bafeb933bf416859bd8",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2015-09-25T18:44:53Z",
    "title_canon_sha256": "3264094049ee2f9030f5be962853e056b4b9c73ff8b47ea009aaa199958f0db5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1509.07827",
    "kind": "arxiv",
    "version": 1
  }
}