Pith Number

pith:PNJK5DHE

pith:2019:PNJK5DHESAH4XNNNCRSXVBQYMJ

not attested not anchored not stored refs pending

Experimental quantum repeater without quantum memory

Feihu Xu, Jian-Wei Pan, Jun Zhang, Li Li, Li-Zheng Liu, Nai-Le Liu, Rui Zhang, Xiao Jiang, Xu-Fei Yin, Yi Hu, Yu-Ao Chen, Yue-Yang Fei, Yu-Qiang Fang, Zheng-Da Li

arxiv:1908.05351 v1 · 2019-08-14 · 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{PNJK5DHESAH4XNNNCRSXVBQYMJ}

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	2026-07-04T23:56:50.798164Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7b52ae8ce4900fcbb5ad14657a86186244241667e52a22689953e88865e132cc

Aliases

arxiv: 1908.05351 · arxiv_version: 1908.05351v1 · doi: 10.48550/arxiv.1908.05351 · pith_short_12: PNJK5DHESAH4 · pith_short_16: PNJK5DHESAH4XNNN · pith_short_8: PNJK5DHE

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/PNJK5DHESAH4XNNNCRSXVBQYMJ \
  | 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: 7b52ae8ce4900fcbb5ad14657a86186244241667e52a22689953e88865e132cc

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ecc435e07f58e61cfa7a0992510b48c8f68247992779a8337f7cf9810425fe3a",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2019-08-14T21:12:25Z",
    "title_canon_sha256": "571eb1faedb63530f2b24a7002fc9435ece0b2e9d1ff4f3cd0ef05582c4541df"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1908.05351",
    "kind": "arxiv",
    "version": 1
  }
}