Pith Number

pith:4RWTLHF6

pith:2026:4RWTLHF6XGKP45C6CSL6FGL3DV

not attested not anchored not stored refs pending

Fundamental limits of parameter estimation with heralded optical non-Gaussian states generated from Gaussian resources

Kazufumi Tanji, Kosuke Fukui, Masahiro Takeoka, Shohei Kiryu, Yoshihiro Ueda

arxiv:2608.06239 v1 · 2026-08-06 · 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{4RWTLHF6XGKP45C6CSL6FGL3DV}

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	2026-08-07T01:41:01.034862Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e46d359cbeb994fe745e1497e2997b1d4fcae037122ab8b7325137f506547ed5

Aliases

arxiv: 2608.06239 · arxiv_version: 2608.06239v1 · doi: 10.48550/arxiv.2608.06239 · pith_short_12: 4RWTLHF6XGKP · pith_short_16: 4RWTLHF6XGKP45C6 · pith_short_8: 4RWTLHF6

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/4RWTLHF6XGKP45C6CSL6FGL3DV \
  | 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: e46d359cbeb994fe745e1497e2997b1d4fcae037122ab8b7325137f506547ed5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3c314e52f7745480af74cd0f2dbd74e97747609b1763637eea84e310911e5f6c",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2026-08-06T16:26:35Z",
    "title_canon_sha256": "be02983425d8addeb66fda535ce8997d7a7bfcd375125c3db3ea10417215d803"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2608.06239",
    "kind": "arxiv",
    "version": 1
  }
}