Pith Number

pith:D7CL5KWB

pith:2006:D7CL5KWBJRY7CVRCJGTYWL3MHG

not attested not anchored not stored refs pending

Mixed Qubit Cannot Be Universally Broadcast

Lin Chen, Yi-Xin Chen

arxiv:quant-ph/0612205 v1 · 2006-12-25 · 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{D7CL5KWBJRY7CVRCJGTYWL3MHG}

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	2026-07-04T17:03:38.689848Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1fc4beaac14c71f1562249a78b2f6c3987c417ff5e5fe71c884ec30bb7833b7c

Aliases

arxiv: quant-ph/0612205 · arxiv_version: quant-ph/0612205v1 · doi: 10.48550/arxiv.quant-ph/0612205 · pith_short_12: D7CL5KWBJRY7 · pith_short_16: D7CL5KWBJRY7CVRC · pith_short_8: D7CL5KWB

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/D7CL5KWBJRY7CVRCJGTYWL3MHG \
  | 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: 1fc4beaac14c71f1562249a78b2f6c3987c417ff5e5fe71c884ec30bb7833b7c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1f222150748bd074da6932386fe2b77a0bb44e1e0c80f39c192e749a2b58f834",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "quant-ph",
    "submitted_at": "2006-12-25T07:24:32Z",
    "title_canon_sha256": "e9abee7d1f115dc895c8811b82a13f83c95c753658e4faedcc22074e5d8b03cf"
  },
  "schema_version": "1.0",
  "source": {
    "id": "quant-ph/0612205",
    "kind": "arxiv",
    "version": 1
  }
}