Pith Number

pith:74RWDPD4

pith:2025:74RWDPD4PDLB4A4XHKX5HIF252

not attested not anchored not stored refs pending

Demonstration of a quantum comparator on an ion-trap quantum device

Akira Shimizu, Hiroki Kuwata, Riku Nakama, Sho Sugiura, Shuhei M. Yoshida, Shunsuke Saeki, Tatsuhiko N. Ikeda

arxiv:2512.17779 v2 · 2025-12-19 · 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{74RWDPD4PDLB4A4XHKX5HIF252}

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	2026-07-20T01:18:24.202101Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ff2361bc7c78d61e03973aafd3a0baeebdb3283483225cf842cea7b41399e3ab

Aliases

arxiv: 2512.17779 · arxiv_version: 2512.17779v2 · doi: 10.48550/arxiv.2512.17779 · pith_short_12: 74RWDPD4PDLB · pith_short_16: 74RWDPD4PDLB4A4X · pith_short_8: 74RWDPD4

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/74RWDPD4PDLB4A4XHKX5HIF252 \
  | 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: ff2361bc7c78d61e03973aafd3a0baeebdb3283483225cf842cea7b41399e3ab

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "402852f36637e148dab5631d4703525a13a9d526394658c077d6221d98ad223e",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2025-12-19T16:49:40Z",
    "title_canon_sha256": "73bf856a005056226e5f139b3aa1520ea65d2eb761f2583ab7118089df6ebd6f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2512.17779",
    "kind": "arxiv",
    "version": 2
  }
}