Pith Number

pith:T76MEHCJ

pith:2004:T76MEHCJKXJN3NZJCRNNGXNCC4

not attested not anchored not stored refs pending

Entanglement Witness Derived from NMR Superdense Coding

Kazuyuki Takeda, Masahiro Kitagawa, Masanao Ozawa, Robabeh Rahimi

arxiv:quant-ph/0405175 v4 · 2004-05-28 · 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{T76MEHCJKXJN3NZJCRNNGXNCC4}

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	2026-07-04T14:46:35.918733Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9ffcc21c4955d2ddb729145ad35da21704e87c4487f1444f6834cb493a06d7c1

Aliases

arxiv: quant-ph/0405175 · arxiv_version: quant-ph/0405175v4 · doi: 10.48550/arxiv.quant-ph/0405175 · pith_short_12: T76MEHCJKXJN · pith_short_16: T76MEHCJKXJN3NZJ · pith_short_8: T76MEHCJ

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/T76MEHCJKXJN3NZJCRNNGXNCC4 \
  | 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: 9ffcc21c4955d2ddb729145ad35da21704e87c4487f1444f6834cb493a06d7c1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a90d0a206ccd51c5e0c022451c9962577a9738cc8d4a0e7367fb7220ce7b9022",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "quant-ph",
    "submitted_at": "2004-05-28T10:51:35Z",
    "title_canon_sha256": "bea63c6ec385375bd0d911db79898e4e208172a5167350e3a37e8be7c5ad7939"
  },
  "schema_version": "1.0",
  "source": {
    "id": "quant-ph/0405175",
    "kind": "arxiv",
    "version": 4
  }
}