Pith Number

pith:YMLLHG4T

pith:2025:YMLLHG4THOJDOW2UWGQVJKTD3L

not attested not anchored not stored refs pending

Emergence of Classicality in Wigner's Friend Scenarios

Sophie Engineer, Tom Rivlin, Veronika Baumann

arxiv:2507.21221 v1 · 2025-07-28 · 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{YMLLHG4THOJDOW2UWGQVJKTD3L}

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	2026-07-05T11:44:54.771498Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c316b39b933b92375b54b1a154aa63dadc82bc9fd64b522944a1979b5a93deb7

Aliases

arxiv: 2507.21221 · arxiv_version: 2507.21221v1 · doi: 10.48550/arxiv.2507.21221 · pith_short_12: YMLLHG4THOJD · pith_short_16: YMLLHG4THOJDOW2U · pith_short_8: YMLLHG4T

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/YMLLHG4THOJDOW2UWGQVJKTD3L \
  | 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: c316b39b933b92375b54b1a154aa63dadc82bc9fd64b522944a1979b5a93deb7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6be8d0d5bf7457efde675fea95e233d8a3d579b78c46a2d5d3882112431d4669",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2025-07-28T18:00:03Z",
    "title_canon_sha256": "0a4123ee8d8e016034985171a1730ad4ce3b95dd9e56b1fe64d23a83404c1bcd"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2507.21221",
    "kind": "arxiv",
    "version": 1
  }
}