Pith Number

pith:URCKWUCV

pith:2026:URCKWUCVCU4RGMRHUETBDWSLG7

not attested not anchored not stored refs pending

Near-optimal quantum metrology with few-qubit measurements

Hsin-Yuan Huang, John Preskill, Liang Mao, Senrui Chen, Sisi Zhou

arxiv:2608.01617 v1 · 2026-08-03 · 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{URCKWUCVCU4RGMRHUETBDWSLG7}

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	2026-08-04T02:06:08.253314Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a444ab50551539133227a12611da4b37f6b6a54718533c05884bb604ad17c20a

Aliases

arxiv: 2608.01617 · arxiv_version: 2608.01617v1 · doi: 10.48550/arxiv.2608.01617 · pith_short_12: URCKWUCVCU4R · pith_short_16: URCKWUCVCU4RGMRH · pith_short_8: URCKWUCV

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/URCKWUCVCU4RGMRHUETBDWSLG7 \
  | 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: a444ab50551539133227a12611da4b37f6b6a54718533c05884bb604ad17c20a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3d495e81b55cb06d4a0ef0cb2062b90fa7a56f09b28840a4dbff28349e44b49e",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2026-08-03T02:46:52Z",
    "title_canon_sha256": "80082de85ea17b11d68f8e68aef0fbc096c12ca56689512d84b8c39382d772cd"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2608.01617",
    "kind": "arxiv",
    "version": 1
  }
}