Pith Number

pith:PMS4KJWW

pith:2019:PMS4KJWWXDD6GXTXQ45OFG2WFK

not attested not anchored not stored refs pending

Upper bounds on the quantum capacity for general attenuator and amplifier

Jaewan Kim, Kabgyun Jeong, Soojoon Lee, Youngrong Lim

arxiv:1903.04728 v2 · 2019-03-12 · 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{PMS4KJWWXDD6GXTXQ45OFG2WFK}

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	2026-05-17T23:45:51.852538Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7b25c526d6b8c7e35e77873ae29b562abe006203718d010c56a1236e8320b86a

Aliases

arxiv: 1903.04728 · arxiv_version: 1903.04728v2 · doi: 10.48550/arxiv.1903.04728 · pith_short_12: PMS4KJWWXDD6 · pith_short_16: PMS4KJWWXDD6GXTX · pith_short_8: PMS4KJWW

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/PMS4KJWWXDD6GXTXQ45OFG2WFK \
  | 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: 7b25c526d6b8c7e35e77873ae29b562abe006203718d010c56a1236e8320b86a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2c564dce7b3765a0defd2b256d040c556753ce958e1ee6fc01226a534c990720",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2019-03-12T04:58:23Z",
    "title_canon_sha256": "888e3819f508bf26fb97bd757fc49944e5a7661a2d4d556c49eb600aa025f4d2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1903.04728",
    "kind": "arxiv",
    "version": 2
  }
}