Pith Number

pith:2T4RA37A

pith:2022:2T4RA37AQNDAHCO5Q4UXR7DOZS

not attested not anchored not stored refs pending

Self-testing randomness from a nuclear spin system

Ilja Gerhardt, J\"org Wrachtrup, Minsik Kwon, Vadim Vorobyov, Xing Chen

arxiv:2203.04577 v3 · 2022-03-09 · quant-ph · physics.data-an

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{2T4RA37AQNDAHCO5Q4UXR7DOZS}

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	2026-07-05T04:12:18.148198Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d4f9106fe083460389dd872978fc6eccace75a3a32b9e4c50fba206c0e734bb6

Aliases

arxiv: 2203.04577 · arxiv_version: 2203.04577v3 · doi: 10.48550/arxiv.2203.04577 · pith_short_12: 2T4RA37AQNDA · pith_short_16: 2T4RA37AQNDAHCO5 · pith_short_8: 2T4RA37A

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/2T4RA37AQNDAHCO5Q4UXR7DOZS \
  | 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: d4f9106fe083460389dd872978fc6eccace75a3a32b9e4c50fba206c0e734bb6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8e9927a7d8949ae24b1a56f2f13aaa792f38ce328e89773e40ee51b59ff34368",
    "cross_cats_sorted": [
      "physics.data-an"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2022-03-09T08:43:45Z",
    "title_canon_sha256": "e3e85095f445921a408ad2a5a5d23fcf26f083ad67aab538514ddcca42a678d6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2203.04577",
    "kind": "arxiv",
    "version": 3
  }
}