Pith Number

pith:JUSUD23U

pith:2025:JUSUD23UAHLRFQCLJYGL5VRE33

not attested not anchored not stored refs pending

Super-additivity of quantum capacity in simple channels

Qi Zhao, Zhen Wu, Zhihao Ma

arxiv:2505.24661 v1 · 2025-05-30 · 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{JUSUD23UAHLRFQCLJYGL5VRE33}

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	2026-07-05T11:12:54.191614Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4d2541eb7401d712c04b4e0cbed624deed6f1eaa4fe87d063adc8df753b9d4bc

Aliases

arxiv: 2505.24661 · arxiv_version: 2505.24661v1 · doi: 10.48550/arxiv.2505.24661 · pith_short_12: JUSUD23UAHLR · pith_short_16: JUSUD23UAHLRFQCL · pith_short_8: JUSUD23U

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/JUSUD23UAHLRFQCLJYGL5VRE33 \
  | 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: 4d2541eb7401d712c04b4e0cbed624deed6f1eaa4fe87d063adc8df753b9d4bc

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6b4bae0d8d22dd178602385ff3196ad925d3ade66928f0a40582897a8fcf1b0c",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2025-05-30T14:48:32Z",
    "title_canon_sha256": "bda28436e050f05672728874f9fd3b38e4da830d88b6aa598ba7b138bb8f6829"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2505.24661",
    "kind": "arxiv",
    "version": 1
  }
}