Pith Number

pith:JUN2T7BH

pith:2020:JUN2T7BHVKOIPOYCCTA4CSKAAN

not attested not anchored not stored refs pending

Superadditivity of channel capacity through quantum fields

Achim Kempf, Aida Ahmadzadegan, Eduardo Mart\'in-Mart\'inez, Koji Yamaguchi, Petar Simidzija

arxiv:2002.04153 v2 · 2020-02-11 · quant-ph · gr-qc · hep-th

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{JUN2T7BHVKOIPOYCCTA4CSKAAN}

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	2026-07-05T01:02:58.363541Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4d1ba9fc27aa9c87bb0214c1c149400353ff65ae1c87de4a031ef3ccdc5c7c5f

Aliases

arxiv: 2002.04153 · arxiv_version: 2002.04153v2 · doi: 10.48550/arxiv.2002.04153 · pith_short_12: JUN2T7BHVKOI · pith_short_16: JUN2T7BHVKOIPOYC · pith_short_8: JUN2T7BH

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/JUN2T7BHVKOIPOYCCTA4CSKAAN \
  | 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: 4d1ba9fc27aa9c87bb0214c1c149400353ff65ae1c87de4a031ef3ccdc5c7c5f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "beb78264dd1dcb14c12d64c64455c8b4a33849b8c646be16390617a04bdba646",
    "cross_cats_sorted": [
      "gr-qc",
      "hep-th"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2020-02-11T00:53:34Z",
    "title_canon_sha256": "3b5343c4dd0a28c338b3d2dbb524e77fbf7ac791c3268a67502b6d7a111c7da9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2002.04153",
    "kind": "arxiv",
    "version": 2
  }
}