Pith Number

pith:HVMKF5NR

pith:2006:HVMKF5NRTCWMTR4PVYEHJSCPKD

not attested not anchored not stored refs pending

Quantum secure direct communication with pure entangled states

Chao-jing Tang, Jian Wang, Quan Zhang

arxiv:quant-ph/0606236 v2 · 2006-06-28 · 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{HVMKF5NRTCWMTR4PVYEHJSCPKD}

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	2026-05-18T04:28:21.977753Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3d58a2f5b198acc9c78fae0874c84f50d90dea91501557a1da618cc60317149d

Aliases

arxiv: quant-ph/0606236 · arxiv_version: quant-ph/0606236v2 · doi: 10.48550/arxiv.quant-ph/0606236 · pith_short_12: HVMKF5NRTCWM · pith_short_16: HVMKF5NRTCWMTR4P · pith_short_8: HVMKF5NR

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/HVMKF5NRTCWMTR4PVYEHJSCPKD \
  | 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: 3d58a2f5b198acc9c78fae0874c84f50d90dea91501557a1da618cc60317149d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d297ca2f380e34408d0bf16cfcd98185a24e5b695989a8d322f5613767c33dd1",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "quant-ph",
    "submitted_at": "2006-06-28T15:21:55Z",
    "title_canon_sha256": "28bba733fa4aaabd033ce9a902cd6156f79818f4202ac6f766c10291c71db490"
  },
  "schema_version": "1.0",
  "source": {
    "id": "quant-ph/0606236",
    "kind": "arxiv",
    "version": 2
  }
}