Pith Number

pith:NGPOYG6V

pith:2022:NGPOYG6VDAFOEE4CYXYLULDVG7

not attested not anchored not stored refs pending

Training variational quantum circuits with CoVaR: covariance root finding with classical shadows

B\'alint Koczor, Gregory Boyd

arxiv:2204.08494 v3 · 2022-04-18 · quant-ph

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Add to your LaTeX paper

\usepackage{pith}
\pithnumber{NGPOYG6VDAFOEE4CYXYLULDVG7}

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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.

Cited by

1 paper in Pith

Finite-Sample Selected Covariance Spectra in Classical Shadows

Receipt and verification

First computed	2026-07-05T05:21:24.942537Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

699eec1bd5180ae21382c5f0ba2c7537e64595a0eb2750e23fa334e5811f3ab8

Aliases

arxiv: 2204.08494 · arxiv_version: 2204.08494v3 · doi: 10.48550/arxiv.2204.08494 · pith_short_12: NGPOYG6VDAFO · pith_short_16: NGPOYG6VDAFOEE4C · pith_short_8: NGPOYG6V

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/NGPOYG6VDAFOEE4CYXYLULDVG7 \
  | 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: 699eec1bd5180ae21382c5f0ba2c7537e64595a0eb2750e23fa334e5811f3ab8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9dcabe177c2fd64fc3e63d401cdc413cd2f61ff8153b8ba4a7cc56b5f717a790",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2022-04-18T18:01:58Z",
    "title_canon_sha256": "6ccd91a27dd8714c9142dc41ef780acbc950456586dbd7516feaec5aa4924188"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2204.08494",
    "kind": "arxiv",
    "version": 3
  }
}