Pith Number

pith:TFZZDVOS

pith:2026:TFZZDVOSYCBZA6RKWSU4RU2CYO

not attested not anchored not stored refs pending

Can a spin-half particle ever give more than two spots in a Stern-Gerlach experiment? -- the subtle physics of effective Hamiltonians

Anthony J. Short, Noah Linden, Sandu Popescu

arxiv:2605.31435 v1 · 2026-05-29 · 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{TFZZDVOSYCBZA6RKWSU4RU2CYO}

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	2026-06-01T02:04:05.624022Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

997391d5d2c083907a2ab4a9c8d342c3bd3f566a4bd0d79987d84e6d8e1edc86

Aliases

arxiv: 2605.31435 · arxiv_version: 2605.31435v1 · doi: 10.48550/arxiv.2605.31435 · pith_short_12: TFZZDVOSYCBZ · pith_short_16: TFZZDVOSYCBZA6RK · pith_short_8: TFZZDVOS

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/TFZZDVOSYCBZA6RKWSU4RU2CYO \
  | 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: 997391d5d2c083907a2ab4a9c8d342c3bd3f566a4bd0d79987d84e6d8e1edc86

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1cece1155cb7ab72ba8ec064308b4f46c3038729e2a84ee6f3edab0ef9e3efe4",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2026-05-29T15:31:49Z",
    "title_canon_sha256": "50304a87c426759a94eda0fecfbb996bcacca737afca7301e8e73fc08721c80c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2605.31435",
    "kind": "arxiv",
    "version": 1
  }
}