Pith Number

pith:MUPDKHQ3

pith:2020:MUPDKHQ3H6SMMZNBMNZRUDHIK5

not attested not anchored not stored refs pending

Quantum causality and the arrows of time and thermodynamics

Gabriel Menezes, John F. Donoghue

arxiv:2003.09047 v2 · 2020-03-19 · quant-ph · gr-qc · hep-ph · hep-th · physics.hist-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{MUPDKHQ3H6SMMZNBMNZRUDHIK5}

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	2026-07-05T01:42:53.820801Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

651e351e1b3fa4c665a163731a0ce857785e780fb33caed88b549ac9314217e4

Aliases

arxiv: 2003.09047 · arxiv_version: 2003.09047v2 · doi: 10.48550/arxiv.2003.09047 · pith_short_12: MUPDKHQ3H6SM · pith_short_16: MUPDKHQ3H6SMMZNB · pith_short_8: MUPDKHQ3

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/MUPDKHQ3H6SMMZNBMNZRUDHIK5 \
  | 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: 651e351e1b3fa4c665a163731a0ce857785e780fb33caed88b549ac9314217e4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2d81215c87d8d37d8ab1e72a7e17dc0c5e57e8567cb31600bc530a88675f4228",
    "cross_cats_sorted": [
      "gr-qc",
      "hep-ph",
      "hep-th",
      "physics.hist-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2020-03-19T23:49:15Z",
    "title_canon_sha256": "f5dc385a0db8f7a1c3046bb07b26a253d33f972ff1038a62b6d53379548c3bb2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2003.09047",
    "kind": "arxiv",
    "version": 2
  }
}