Pith Number

pith:XMHS3DBF

pith:2021:XMHS3DBFOKBZ6D3HHFH6OUZDO6

not attested not anchored not stored refs pending

Direct Fidelity Estimation of Quantum States using Machine Learning

Maolin Luo, Qin Feng, Shengshi Pang, Weiqi Luo, Xiaoqian Zhang, Xiaoqi Zhou, Zhaodi Wen

arxiv:2102.02369 v2 · 2021-02-04 · 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{XMHS3DBFOKBZ6D3HHFH6OUZDO6}

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	2026-07-05T03:17:30.170178Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

bb0f2d8c2572839f0f67394fe75323778b10d713bb93f8a79ff543c888129ff6

Aliases

arxiv: 2102.02369 · arxiv_version: 2102.02369v2 · doi: 10.48550/arxiv.2102.02369 · pith_short_12: XMHS3DBFOKBZ · pith_short_16: XMHS3DBFOKBZ6D3H · pith_short_8: XMHS3DBF

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/XMHS3DBFOKBZ6D3HHFH6OUZDO6 \
  | 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: bb0f2d8c2572839f0f67394fe75323778b10d713bb93f8a79ff543c888129ff6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7c1ef5fc58598832a2fde2de387f0c5a23d0d04b2b3381e7d1a63ce7651a001e",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2021-02-04T02:08:21Z",
    "title_canon_sha256": "8347e917565b82979ca7ad47e25fbc378601424b927d56b279dbd714669b16b6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2102.02369",
    "kind": "arxiv",
    "version": 2
  }
}