Pith Number

pith:OXQOY7R5

pith:2021:OXQOY7R5T7Q7GD4AGZN6AGZ3YH

not attested not anchored not stored refs pending

Process tomography in general physical theories

Giulio Chiribella

arxiv:2109.12067 v3 · 2021-09-24 · quant-ph · cs.LO · 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{OXQOY7R5T7Q7GD4AGZN6AGZ3YH}

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	2026-07-05T04:59:52.733486Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

75e0ec7e3d9fe1f30f80365be01b3bc1c809a66cbc25614482fe94b07e1fb733

Aliases

arxiv: 2109.12067 · arxiv_version: 2109.12067v3 · doi: 10.48550/arxiv.2109.12067 · pith_short_12: OXQOY7R5T7Q7 · pith_short_16: OXQOY7R5T7Q7GD4A · pith_short_8: OXQOY7R5

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/OXQOY7R5T7Q7GD4AGZN6AGZ3YH \
  | 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: 75e0ec7e3d9fe1f30f80365be01b3bc1c809a66cbc25614482fe94b07e1fb733

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "bb320c75077e629dedce6eddb275072fa846510596b462abfc7a2899c177492a",
    "cross_cats_sorted": [
      "cs.LO",
      "physics.hist-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2021-09-24T16:49:30Z",
    "title_canon_sha256": "db90393ac43d01443f53df7f0a4683585da26ed773944fad22d07724be5e847c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2109.12067",
    "kind": "arxiv",
    "version": 3
  }
}