Pith Number

pith:KUBA3ARA

pith:2019:KUBA3ARA6PQ46VM62RDPBLXAFF

not attested not anchored not stored refs pending

Silicon Hard-Stop Spacers for 3D Integration of Superconducting Qubits

Alexander J. Melville, Bethany M. Niedzielski, Danna Rosenberg, David K. Kim, Donna Ruth-Yost, Greg Calusine, Jason Plant, Jonilyn L. Yoder, Livia Racz, Mollie E. Schwartz, Rabi Das, William D. Oliver

arxiv:1907.12882 v1 · 2019-07-30 · physics.app-ph · 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{KUBA3ARA6PQ46VM62RDPBLXAFF}

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	2026-07-04T23:50:25.337873Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

55020d8220f3e1cf559ed446f0aee029550a58f0b6caaf5c2cadaf32d7b62b5a

Aliases

arxiv: 1907.12882 · arxiv_version: 1907.12882v1 · doi: 10.48550/arxiv.1907.12882 · pith_short_12: KUBA3ARA6PQ4 · pith_short_16: KUBA3ARA6PQ46VM6 · pith_short_8: KUBA3ARA

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/KUBA3ARA6PQ46VM62RDPBLXAFF \
  | 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: 55020d8220f3e1cf559ed446f0aee029550a58f0b6caaf5c2cadaf32d7b62b5a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2c716bdbfee0511dbdbd2c044a3dc3a93ea56733e47a087d14725ff291e5fcd6",
    "cross_cats_sorted": [
      "quant-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.app-ph",
    "submitted_at": "2019-07-30T13:20:24Z",
    "title_canon_sha256": "41528041db2afe909309f8820461433995df79ad6f3207a84d42270d1f96f1ee"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1907.12882",
    "kind": "arxiv",
    "version": 1
  }
}