Pith Number

pith:6JU5FGUB

pith:2025:6JU5FGUBXID53WLHJ5A3OULHP6

not attested not anchored not stored refs pending

Long-distance free-space quantum key distribution with continuous variables

Cheng Ye, Feiyu Ji, Guihua Zeng, Hanwen Yin, Hao Fang, Haoze Chen, Huasheng Li, Huiting Fu, Jiaqi Han, Jincai Wu, Peng Huang, Piao Tan, Tao Wang, Tianxiang Zhan, Wei Qi, Xueqin Jiang, Yajun Miao, Yingming Zhou, Zehao Zhou, Zijing Wu

arxiv:2507.21546 v1 · 2025-07-29 · 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{6JU5FGUBXID53WLHJ5A3OULHP6}

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	2026-07-05T11:45:02.107252Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f269d29a81ba07ddd9674f41b751677fb809234a75e2e9bb7f70f5a4861ea2ca

Aliases

arxiv: 2507.21546 · arxiv_version: 2507.21546v1 · doi: 10.48550/arxiv.2507.21546 · pith_short_12: 6JU5FGUBXID5 · pith_short_16: 6JU5FGUBXID53WLH · pith_short_8: 6JU5FGUB

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/6JU5FGUBXID53WLHJ5A3OULHP6 \
  | 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: f269d29a81ba07ddd9674f41b751677fb809234a75e2e9bb7f70f5a4861ea2ca

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e48bf9d2381a7ac143021e6c28b79bd22f5fe6ac38243cb62936cc5e9c469fcf",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2025-07-29T07:21:24Z",
    "title_canon_sha256": "ff2da693427609532e00c8e81d0fff52bbf5d05cb4771470ac134808bfec67ac"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2507.21546",
    "kind": "arxiv",
    "version": 1
  }
}