Pith Number

pith:HRVZ3X5R

pith:2021:HRVZ3X5R4DCEJ4ERPLT2EBXYES

not attested not anchored not stored refs pending

Long-distance entanglement purification for quantum communication

Bi-Heng Liu, Cen-Xiao Huang, Chao Zhang, Chuan-Feng Li, Guang-Can Guo, Lan Zhou, Wen-Bo Xing, Xiao-Min Hu, Yu-Bo Sheng, Yu Guo, Yun-Feng Huang

arxiv:2101.07441 v2 · 2021-01-19 · 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{HRVZ3X5R4DCEJ4ERPLT2EBXYES}

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	2026-07-05T02:08:22.139801Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3c6b9ddfb1e0c444f0917ae7a206f8249729d6c2330f313ba87b4cfdabd1f88e

Aliases

arxiv: 2101.07441 · arxiv_version: 2101.07441v2 · doi: 10.48550/arxiv.2101.07441 · pith_short_12: HRVZ3X5R4DCE · pith_short_16: HRVZ3X5R4DCEJ4ER · pith_short_8: HRVZ3X5R

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/HRVZ3X5R4DCEJ4ERPLT2EBXYES \
  | 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: 3c6b9ddfb1e0c444f0917ae7a206f8249729d6c2330f313ba87b4cfdabd1f88e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8907f55a2eab86df68dd75bcce6c0661bc785b9c44478806ddf01b72cb54d8e9",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2021-01-19T03:25:01Z",
    "title_canon_sha256": "e08fffddc508a96fcd8cc478debf3482cb5cfe986abdc3adb61c4abc7b2f39b2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2101.07441",
    "kind": "arxiv",
    "version": 2
  }
}