Pith Number

pith:5SM4HP2B

pith:2022:5SM4HP2BPONVC7SRQE3PJAYBYD

not attested not anchored not stored refs pending

Generic nonadditivity of quantum capacity in simple channels

Debbie Leung, Felix Leditzky, Graeme Smith, John A. Smolin, Vikesh Siddhu

arxiv:2202.08377 v2 · 2022-02-16 · quant-ph · cs.IT · math.IT

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{5SM4HP2BPONVC7SRQE3PJAYBYD}

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	2026-07-05T06:19:51.686553Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ec99c3bf417b9b517e518136f48301c0cada20bf9d3857484cc2b690f3170bcf

Aliases

arxiv: 2202.08377 · arxiv_version: 2202.08377v2 · doi: 10.48550/arxiv.2202.08377 · pith_short_12: 5SM4HP2BPONV · pith_short_16: 5SM4HP2BPONVC7SR · pith_short_8: 5SM4HP2B

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/5SM4HP2BPONVC7SRQE3PJAYBYD \
  | 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: ec99c3bf417b9b517e518136f48301c0cada20bf9d3857484cc2b690f3170bcf

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e1257868c5681e57187c3bd9353d3e044dca42a6eaf4c7b4512f2c72368073ad",
    "cross_cats_sorted": [
      "cs.IT",
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2022-02-16T23:43:18Z",
    "title_canon_sha256": "4c98f658b5f4226da70b13a1e099a429857f32df195a01c2cb8e574fe4c6e8d9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2202.08377",
    "kind": "arxiv",
    "version": 2
  }
}