Pith Number

pith:4OOGFQKM

pith:2016:4OOGFQKM37LGKHS6EOKSCLUKKN

not attested not anchored not stored refs pending

Quantum Zeno subspaces by repeated multi-spin projections

Daniel J. Twitchen, Julia Cramer, Matthew Markham, Norbert Kalb, Ronald Hanson, Tim H. Taminiau

arxiv:1603.03368 v1 · 2016-03-10 · quant-ph

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

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	2026-05-18T00:42:23.993200Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e39c62c14cdfd6651e5e2395212e8a537a7be82c75c9caf348288d08c987f70d

Aliases

arxiv: 1603.03368 · arxiv_version: 1603.03368v1 · doi: 10.48550/arxiv.1603.03368 · pith_short_12: 4OOGFQKM37LG · pith_short_16: 4OOGFQKM37LGKHS6 · pith_short_8: 4OOGFQKM

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/4OOGFQKM37LGKHS6EOKSCLUKKN \
  | 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: e39c62c14cdfd6651e5e2395212e8a537a7be82c75c9caf348288d08c987f70d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c421b622855bf74b41688eaa9b90ac6efbfbd5f6df78c5a7d8d64c31dfe61f71",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2016-03-10T18:55:13Z",
    "title_canon_sha256": "623bd8df8cf6abdc04becbca08e5709dfd3b2df3c36dcb2e94322b14143c31ef"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1603.03368",
    "kind": "arxiv",
    "version": 1
  }
}