Pith Number

pith:GLWF4DLG

pith:2018:GLWF4DLGJXDUE3APCF46FXQ3VC

not attested not anchored not stored refs pending

Efficiency of a quantum Otto heat engine operating under a reservoir at effective negative temperatures

Alexandre M. de Souza, Celso J. Villas-Boas, Ivan S. Oliveira, Norton G. de Almeida, Roberto S. Sarthour, Rog\'erio J. de Assis, Taysa M. de Mendon\c{c}a

arxiv:1811.02917 v3 · 2018-11-07 · 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	2026-05-17T23:42:26.598776Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

32ec5e0d664dc7426c0f1179e2de1ba8860afc8dc2a995cc91176738dfa9ea66

Aliases

arxiv: 1811.02917 · arxiv_version: 1811.02917v3 · doi: 10.48550/arxiv.1811.02917 · pith_short_12: GLWF4DLGJXDU · pith_short_16: GLWF4DLGJXDUE3AP · pith_short_8: GLWF4DLG

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/GLWF4DLGJXDUE3APCF46FXQ3VC \
  | 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: 32ec5e0d664dc7426c0f1179e2de1ba8860afc8dc2a995cc91176738dfa9ea66

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1c240b5793f5b1ac2bcf461c3fed905433be15bf84c8901017261d7dc3a276d0",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2018-11-07T14:53:39Z",
    "title_canon_sha256": "89fc990fc993a0dafb950d92ee600abd15bd96262ddb5de52ddbe24059849066"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1811.02917",
    "kind": "arxiv",
    "version": 3
  }
}