Pith Number

pith:2RHFZNTU

pith:2026:2RHFZNTUDHE2N3HTZUWI2I5W4Z

not attested not anchored not stored refs pending

Sufficient conditions for additivity of the zero-error classical capacity of quantum channels

Jeonghoon Park, Jeong San Kim

arxiv:2601.18538 v2 · 2026-01-26 · 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{2RHFZNTUDHE2N3HTZUWI2I5W4Z}

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	2026-07-14T01:20:52.171870Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d44e5cb67419c9a6ecf3cd2c8d23b6e674dfa999a70df36d9c01c7e15f04a453

Aliases

arxiv: 2601.18538 · arxiv_version: 2601.18538v2 · doi: 10.48550/arxiv.2601.18538 · pith_short_12: 2RHFZNTUDHE2 · pith_short_16: 2RHFZNTUDHE2N3HT · pith_short_8: 2RHFZNTU

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/2RHFZNTUDHE2N3HTZUWI2I5W4Z \
  | 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: d44e5cb67419c9a6ecf3cd2c8d23b6e674dfa999a70df36d9c01c7e15f04a453

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "bbd15ad6b727f16089823605f35c7fc519693fb6faaeb288a5584479929ecda4",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by-nc-sa/4.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2026-01-26T14:45:23Z",
    "title_canon_sha256": "ab557847e4b178269a629bf8712c8bf10c57276d4b18b2a0a5ab54a4c5b5b4f5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2601.18538",
    "kind": "arxiv",
    "version": 2
  }
}