Pith Number

pith:4QGUIEXA

pith:2018:4QGUIEXAZ5QDGJWPZJ4QMZV5BE

not attested not anchored not stored refs pending

Roughness as Classicality Indicator of a Quantum State

Ad\'elcio C. Oliveira, Alexandre C. L. Almeida, Barbara Amaral, Humberto C. F. Lemos

arxiv:1802.02880 v1 · 2018-02-08 · 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{4QGUIEXAZ5QDGJWPZJ4QMZV5BE}

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	2026-05-18T00:23:51.851000Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e40d4412e0cf603326cfca790666bd09068728763be45f27b59be6b92ffbbffd

Aliases

arxiv: 1802.02880 · arxiv_version: 1802.02880v1 · doi: 10.48550/arxiv.1802.02880 · pith_short_12: 4QGUIEXAZ5QD · pith_short_16: 4QGUIEXAZ5QDGJWP · pith_short_8: 4QGUIEXA

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/4QGUIEXAZ5QDGJWPZJ4QMZV5BE \
  | 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: e40d4412e0cf603326cfca790666bd09068728763be45f27b59be6b92ffbbffd

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8aec171a02a7d6a013c2ddfa4d0d2ea08e18e752a238db57b1724c74007f0aa8",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2018-02-08T14:35:34Z",
    "title_canon_sha256": "e1247d7322ba90ba98f768eaf06b99dab8e8db903b6626619dc36ba54910324f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1802.02880",
    "kind": "arxiv",
    "version": 1
  }
}