Pith Number

pith:SQXFEX4J

pith:2025:SQXFEX4JAI5S6JRGYFJQ43FACS

not attested not anchored not stored refs pending

BVQC: A Backdoor-style Watermarking Scheme for Variational Quantum Circuits

Cheng Chu, Fan Chen, Lei Jiang

arxiv:2508.01893 v1 · 2025-08-03 · quant-ph · cs.ET

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{SQXFEX4JAI5S6JRGYFJQ43FACS}

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	2026-07-05T11:47:47.116226Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

942e525f89023b2f2626c1530e6ca014a321e1a4396c84304f0d4d89eef6e408

Aliases

arxiv: 2508.01893 · arxiv_version: 2508.01893v1 · doi: 10.48550/arxiv.2508.01893 · pith_short_12: SQXFEX4JAI5S · pith_short_16: SQXFEX4JAI5S6JRG · pith_short_8: SQXFEX4J

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/SQXFEX4JAI5S6JRGYFJQ43FACS \
  | 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: 942e525f89023b2f2626c1530e6ca014a321e1a4396c84304f0d4d89eef6e408

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d351a4ecd00277066331a7320331ee1b552c011bc170e830b683323522a68560",
    "cross_cats_sorted": [
      "cs.ET"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2025-08-03T19:06:31Z",
    "title_canon_sha256": "e7de2f194e71961e5821d7592658e28f4f308fecffc86306aeb99b1f4c7e4f41"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2508.01893",
    "kind": "arxiv",
    "version": 1
  }
}