Pith Number

pith:RLWF2ZBF

pith:2026:RLWF2ZBFVIWJ3ORWA2K4Y2MKME

not attested not anchored not stored refs pending

Geometric obstructions to quadratic time scaling in multiparameter quantum estimation

Eoin O'Connor, Jiayu He, Marco G. Genoni, Matteo G. A. Paris

arxiv:2607.06410 v1 · 2026-07-07 · 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{RLWF2ZBFVIWJ3ORWA2K4Y2MKME}

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	2026-07-08T01:19:24.624180Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8aec5d6425aa2c9dba360695cc698a61251591cf6bf35fc07cea8d4345a6668f

Aliases

arxiv: 2607.06410 · arxiv_version: 2607.06410v1 · doi: 10.48550/arxiv.2607.06410 · pith_short_12: RLWF2ZBFVIWJ · pith_short_16: RLWF2ZBFVIWJ3ORW · pith_short_8: RLWF2ZBF

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/RLWF2ZBFVIWJ3ORWA2K4Y2MKME \
  | 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: 8aec5d6425aa2c9dba360695cc698a61251591cf6bf35fc07cea8d4345a6668f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1401e73fa8cf76789ed00f0e972525fde964e5849c6e0d29f0ea3517580d6909",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2026-07-07T15:40:45Z",
    "title_canon_sha256": "e6635760191f57397253babd981907497c0119e4ac42cca4af1dc5d3dcb1cf29"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2607.06410",
    "kind": "arxiv",
    "version": 1
  }
}