Pith Number

pith:IWZ43LWY

pith:2026:IWZ43LWY5DDIPR2DOUYAHDZIMG

not attested not anchored not stored refs pending

No-Go Theorem for Ancilla-Assisted Gaussian Enhancement in Passive-Unitary Estimation

Saikat Guha, Zihao Gong

arxiv:2606.00256 v1 · 2026-05-29 · 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{IWZ43LWY5DDIPR2DOUYAHDZIMG}

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	2026-06-02T01:03:22.882481Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

45b3cdaed8e8c687c7437530038f28618a3ecb9dcad4ca1e559b1061a9a12601

Aliases

arxiv: 2606.00256 · arxiv_version: 2606.00256v1 · doi: 10.48550/arxiv.2606.00256 · pith_short_12: IWZ43LWY5DDI · pith_short_16: IWZ43LWY5DDIPR2D · pith_short_8: IWZ43LWY

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/IWZ43LWY5DDIPR2DOUYAHDZIMG \
  | 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: 45b3cdaed8e8c687c7437530038f28618a3ecb9dcad4ca1e559b1061a9a12601

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "616fb278e352aec4a2fa39986076f0370ed76f543262db0d7cd2f803f7f32ba8",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2026-05-29T18:42:05Z",
    "title_canon_sha256": "028bf373ad964bc6f5f5a55ee15109cfae16d1c6ef4b5baf221e8c00c4b70175"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2606.00256",
    "kind": "arxiv",
    "version": 1
  }
}