Pith Number

pith:ZFPBGXBW

pith:2026:ZFPBGXBWCMTJINMZPTMKLV4TII

not attested not anchored not stored refs pending

Absent, Not Faint: Fisher-Information Limits and a Logarithmic Measurement-Design Cure for Passive Characterization of Coherent Qubit Noise

Hanqi Jiang, Isaac Lyngaas, Junhao Chen, Meng Hsiu Tsai, Tianming Liu, Weihang You, Wei Zhang, Yingfeng Wang, Yi Pan

arxiv:2607.21663 v1 · 2026-07-23 · 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{ZFPBGXBWCMTJINMZPTMKLV4TII}

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	2026-07-27T00:20:13.927367Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c95e135c3613269435997cd8a5d793423e2ab32186f7855a81453d3ce713c7ce

Aliases

arxiv: 2607.21663 · arxiv_version: 2607.21663v1 · doi: 10.48550/arxiv.2607.21663 · pith_short_12: ZFPBGXBWCMTJ · pith_short_16: ZFPBGXBWCMTJINMZ · pith_short_8: ZFPBGXBW

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/ZFPBGXBWCMTJINMZPTMKLV4TII \
  | 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: c95e135c3613269435997cd8a5d793423e2ab32186f7855a81453d3ce713c7ce

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2cf0809a0661f131c0d87e21357cdb89c4f30b989e5db6180322bf0a58a121f5",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2026-07-23T00:46:29Z",
    "title_canon_sha256": "20a724f80d51a835ddabe9d27f52c26033c5d9973863f3c3e87b1d0ab2fd87b4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2607.21663",
    "kind": "arxiv",
    "version": 1
  }
}