Pith Number

pith:47ZHBPBK

pith:2016:47ZHBPBK7B7K7IL5BFN3UD4AQK

not attested not anchored not stored refs pending

Free-space quantum signatures using heterodyne detection

Bettina Heim, Callum Croal, Christian Peuntinger, Christoph Marquardt, Erika Andersson, Gerd Leuchs, Imran Khan, Natalia Korolkova, Petros Wallden

arxiv:1604.03708 v1 · 2016-04-13 · 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{47ZHBPBK7B7K7IL5BFN3UD4AQK}

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	2026-05-18T01:04:49.973002Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e7f270bc2af87eafa17d095bba0f8082befc416b530aad4cf51280f70780caa1

Aliases

arxiv: 1604.03708 · arxiv_version: 1604.03708v1 · doi: 10.48550/arxiv.1604.03708 · pith_short_12: 47ZHBPBK7B7K · pith_short_16: 47ZHBPBK7B7K7IL5 · pith_short_8: 47ZHBPBK

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/47ZHBPBK7B7K7IL5BFN3UD4AQK \
  | 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: e7f270bc2af87eafa17d095bba0f8082befc416b530aad4cf51280f70780caa1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c1abcbacf419d04e8f9f28ab6cef996a611db6b322c02e486c675d0b07168ea3",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2016-04-13T09:49:56Z",
    "title_canon_sha256": "8ccf9299279bb8cfa3bfb7c70eec5638a79cfbe2b47b6e8451309b5762741212"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1604.03708",
    "kind": "arxiv",
    "version": 1
  }
}