Pith Number

pith:DKN4EPSM

pith:2015:DKN4EPSM3SN5OWJDY3BSUVMNI7

not attested not anchored not stored refs pending

Quantum information tapping using a fiber optical parametric amplifier with noise figure improved by correlated inputs

Nannan Liu, Xiaoying Li, Xueshi Guo, Yuhong Liu, Z. Y. Ou

arxiv:1504.07345 v2 · 2015-04-28 · quant-ph · physics.optics

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{DKN4EPSM3SN5OWJDY3BSUVMNI7}

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	2026-05-18T01:15:58.653044Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1a9bc23e4cdc9bd75923c6c32a558d47d5dca478ac4d6ba7b5cf4a6fd53c2ce8

Aliases

arxiv: 1504.07345 · arxiv_version: 1504.07345v2 · doi: 10.48550/arxiv.1504.07345 · pith_short_12: DKN4EPSM3SN5 · pith_short_16: DKN4EPSM3SN5OWJD · pith_short_8: DKN4EPSM

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/DKN4EPSM3SN5OWJDY3BSUVMNI7 \
  | 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: 1a9bc23e4cdc9bd75923c6c32a558d47d5dca478ac4d6ba7b5cf4a6fd53c2ce8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b336fb45575225e8f74d4ee2cfcf518c27c679c75b6c1e01b3e60cfd0f27358c",
    "cross_cats_sorted": [
      "physics.optics"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2015-04-28T05:10:09Z",
    "title_canon_sha256": "4a9447118a109f70a1576d24422d356b989c3b7476147e8cf42266639befb6ad"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1504.07345",
    "kind": "arxiv",
    "version": 2
  }
}