Pith Number

pith:UY7FHAWC

pith:2018:UY7FHAWC2KN3P6R4B7LIGBTDTX

not attested not anchored not stored refs pending

Why initial system-environment correlations do not imply the failure of complete positivity: a causal perspective

David Schmid, Katja Ried, Robert W. Spekkens

arxiv:1806.02381 v3 · 2018-06-06 · 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{UY7FHAWC2KN3P6R4B7LIGBTDTX}

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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.

Cited by

1 paper in Pith

Measure of not-completely-positive qubit maps: the general case

Receipt and verification

First computed	2026-07-04T23:58:44.225868Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a63e5382c2d29bb7fa3c0fd68306639dcfcfdbfbf0055db8c0db774d768dc84f

Aliases

arxiv: 1806.02381 · arxiv_version: 1806.02381v3 · doi: 10.48550/arxiv.1806.02381 · pith_short_12: UY7FHAWC2KN3 · pith_short_16: UY7FHAWC2KN3P6R4 · pith_short_8: UY7FHAWC

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/UY7FHAWC2KN3P6R4B7LIGBTDTX \
  | 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: a63e5382c2d29bb7fa3c0fd68306639dcfcfdbfbf0055db8c0db774d768dc84f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2bcfff4ff29d0c6dfd20768f5ff662934819a254997c4c0b091a1b2168dcdb18",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2018-06-06T18:49:10Z",
    "title_canon_sha256": "81790b2782b842807dcb56f02c93738c26943b1da24ce7dc4a021cb667241277"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1806.02381",
    "kind": "arxiv",
    "version": 3
  }
}