Pith Number

pith:R2H7MFNB

pith:1998:R2H7MFNBVIM3AWM4Q5GMJOSPF5

not attested not anchored not stored refs pending

Quantum cloning and the capacity of the Pauli channel

Nicolas J. Cerf (Caltech)

arxiv:quant-ph/9803058 v2 · 1998-03-22 · 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{R2H7MFNBVIM3AWM4Q5GMJOSPF5}

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.

Cited by

2 papers in Pith

Enhanced quantum capacity thresholds from symmetry

Receipt and verification

First computed	2026-07-04T16:10:28.527192Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8e8ff615a1aa19b0599c874cc4ba4f2f4ad65815d986cf64d60bc38a4bf121e7

Aliases

arxiv: quant-ph/9803058 · arxiv_version: quant-ph/9803058v2 · doi: 10.48550/arxiv.quant-ph/9803058 · pith_short_12: R2H7MFNBVIM3 · pith_short_16: R2H7MFNBVIM3AWM4 · pith_short_8: R2H7MFNB

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/R2H7MFNBVIM3AWM4Q5GMJOSPF5 \
  | 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: 8e8ff615a1aa19b0599c874cc4ba4f2f4ad65815d986cf64d60bc38a4bf121e7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e6d74a86b7aea121c05a84e341ef5180ca70536448b5a6b5d5335413acee80f0",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "quant-ph",
    "submitted_at": "1998-03-22T04:51:03Z",
    "title_canon_sha256": "8c26ab85b8e566f7dc6569b4a2217ccf3b1c48eeaa5801be28691f6e79eb7ea8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "quant-ph/9803058",
    "kind": "arxiv",
    "version": 2
  }
}