Pith Number

pith:VDDAILF7

pith:2019:VDDAILF7FQQNR37UPQMN725ZCG

not attested not anchored not stored refs pending

Practical issues of twin-field quantum key distribution

1Wei Huang, Bing-Jie Xu, De-Yong He, Feng-yu Lu, Guang-Can Guo, Guan-Jie Fan-Yuan, Rong-Wang, Shuang Wang, Wei Chen, Zheng-Fu Han, Zhen-Qiang Yin

arxiv:1901.04264 v3 · 2019-01-14 · 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{VDDAILF7FQQNR37UPQMN725ZCG}

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	2026-05-17T23:48:30.927726Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a8c6042cbf2c20d8eff47c18dfebb911a25eeced3bba95e31132d6932b3a90f4

Aliases

arxiv: 1901.04264 · arxiv_version: 1901.04264v3 · doi: 10.48550/arxiv.1901.04264 · pith_short_12: VDDAILF7FQQN · pith_short_16: VDDAILF7FQQNR37U · pith_short_8: VDDAILF7

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/VDDAILF7FQQNR37UPQMN725ZCG \
  | 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: a8c6042cbf2c20d8eff47c18dfebb911a25eeced3bba95e31132d6932b3a90f4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ee8661b1fa10432553484b98e8d15a320e2adc5af16c3bcac467f9c64234b6a3",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2019-01-14T12:36:26Z",
    "title_canon_sha256": "55c6bce8524f05033b021e290da51a4fb96bfee88e4a1b5272d7ee6f1e9e5442"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1901.04264",
    "kind": "arxiv",
    "version": 3
  }
}