Pith Number

pith:7CFFAMCA

pith:2009:7CFFAMCASAUQZO7ECQFQDOTCDQ

not attested not anchored not stored refs pending

Anomalous lack of decoherence of the Macroscopic Quantum Superpositions based on phase-covariant Quantum Cloning

Fabio Sciarrino, Francesco De Martini, Nicolo' Spagnolo

arxiv:0904.4316 v2 · 2009-04-28 · 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{7CFFAMCASAUQZO7ECQFQDOTCDQ}

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	2026-05-18T02:13:56.757745Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f88a50304090290cbbe4140b01ba621c15f564152afc6e3f493ae8dd8ad52add

Aliases

arxiv: 0904.4316 · arxiv_version: 0904.4316v2 · doi: 10.48550/arxiv.0904.4316 · pith_short_12: 7CFFAMCASAUQ · pith_short_16: 7CFFAMCASAUQZO7E · pith_short_8: 7CFFAMCA

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/7CFFAMCASAUQZO7ECQFQDOTCDQ \
  | 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: f88a50304090290cbbe4140b01ba621c15f564152afc6e3f493ae8dd8ad52add

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0384c5e77be9e0e2cd11d118b9ada268661e7379ed636d0c4a2cc2137eaa5fb5",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2009-04-28T06:26:40Z",
    "title_canon_sha256": "00276b8320cac7488de45f1ad7490c3e8c7430da56a5fc89fd46bf6f929530ae"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0904.4316",
    "kind": "arxiv",
    "version": 2
  }
}