Pith Number

pith:UMSX4AXT

pith:2006:UMSX4AXT5NPZPHZENGQJ45NB3O

not attested not anchored not stored refs pending

Quantum secure direct communication network with superdense coding and decoy photons

Chun-Yan Li, Fu-Guo Deng, Hong-Yu Zhou, Ping Zhou, Xi-Han Li

arxiv:quant-ph/0605214 v2 · 2006-05-25 · 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{UMSX4AXT5NPZPHZENGQJ45NB3O}

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	2026-05-18T01:37:56.574397Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a3257e02f3eb5f979f2469a09e75a1dbbdcbb9bcf50cc4bb5ed42548a4668289

Aliases

arxiv: quant-ph/0605214 · arxiv_version: quant-ph/0605214v2 · doi: 10.48550/arxiv.quant-ph/0605214 · pith_short_12: UMSX4AXT5NPZ · pith_short_16: UMSX4AXT5NPZPHZE · pith_short_8: UMSX4AXT

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/UMSX4AXT5NPZPHZENGQJ45NB3O \
  | 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: a3257e02f3eb5f979f2469a09e75a1dbbdcbb9bcf50cc4bb5ed42548a4668289

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "fc942dd31be3dd3cb898cc042792786a72ab6fe455ec134d958927179297f2da",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "quant-ph",
    "submitted_at": "2006-05-25T05:38:27Z",
    "title_canon_sha256": "66f904d0bfd5296e3b272c055895947a450e3e22f7b8c5b20f379b923798e787"
  },
  "schema_version": "1.0",
  "source": {
    "id": "quant-ph/0605214",
    "kind": "arxiv",
    "version": 2
  }
}