Pith Number

pith:PUJYD2VT

pith:2006:PUJYD2VTOSORFZMSZOZMMTQXTF

not attested not anchored not stored refs pending

Controlled Secure Direct Communication by Using GHZ Entangled State

Chang-Bao Fu, Chung-In Um, Feng-Yue Li, Kyu-Hwang Yeon, Shou Zhang, Yan Xia

arxiv:quant-ph/0601145 v1 · 2006-01-21 · 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{PUJYD2VTOSORFZMSZOZMMTQXTF}

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	2026-07-04T14:52:57.761907Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7d1381eab3749d12e592cbb2c64e17997b581bd9339af64220ff89302933338b

Aliases

arxiv: quant-ph/0601145 · arxiv_version: quant-ph/0601145v1 · doi: 10.48550/arxiv.quant-ph/0601145 · pith_short_12: PUJYD2VTOSOR · pith_short_16: PUJYD2VTOSORFZMS · pith_short_8: PUJYD2VT

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/PUJYD2VTOSORFZMSZOZMMTQXTF \
  | 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: 7d1381eab3749d12e592cbb2c64e17997b581bd9339af64220ff89302933338b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5a11d6bacc00b69bcdb56a3f7be59c847371b3f22a386f5b938336a4b7293835",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "quant-ph",
    "submitted_at": "2006-01-21T07:20:01Z",
    "title_canon_sha256": "214cb3cbd74689769dc0b01d6aa3bbb9a37863ba8fb2dc55e470cafc7a403097"
  },
  "schema_version": "1.0",
  "source": {
    "id": "quant-ph/0601145",
    "kind": "arxiv",
    "version": 1
  }
}