Pith Number

pith:EFLYPFPF

pith:2009:EFLYPFPFKA3PANJ2S2XFMU65E2

not attested not anchored not stored refs pending

Coherent State Quantum Key Distribution with Multi Letter Phase-Shift Keying

Denis Sych, Gerd Leuchs

arxiv:0902.1895 v2 · 2009-02-11 · 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{EFLYPFPFKA3PANJ2S2XFMU65E2}

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	2026-05-18T02:14:48.327403Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

21578795e55036f0353a96ae5653dd26b1a4c0117985d7bb21ada7c4fc356451

Aliases

arxiv: 0902.1895 · arxiv_version: 0902.1895v2 · doi: 10.48550/arxiv.0902.1895 · pith_short_12: EFLYPFPFKA3P · pith_short_16: EFLYPFPFKA3PANJ2 · pith_short_8: EFLYPFPF

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/EFLYPFPFKA3PANJ2S2XFMU65E2 \
  | 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: 21578795e55036f0353a96ae5653dd26b1a4c0117985d7bb21ada7c4fc356451

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2a559352a683cf0bc216cdb9ca1230c01b501c8e698fc173129de062ced555a1",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/3.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2009-02-11T14:26:30Z",
    "title_canon_sha256": "b6ab0a8ea7303e1ed3d2ccad47c2f571a8f4e3123e3ca8e1bb838589e573c4fb"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0902.1895",
    "kind": "arxiv",
    "version": 2
  }
}