Pith Number

pith:UKOBB5YE

pith:2018:UKOBB5YEPNUBOZACVOLO3T6GMP

not attested not anchored not stored refs pending

The Density Operators of Qubit Systems in the Multiparticle Spacetime Algebra

Chih-Wei Wang

arxiv:1804.08375 v1 · 2018-04-23 · 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{UKOBB5YEPNUBOZACVOLO3T6GMP}

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	2026-05-18T00:17:48.614349Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a29c10f7047b68176402ab96edcfc663f6f725529572d285bef8c52e846137cd

Aliases

arxiv: 1804.08375 · arxiv_version: 1804.08375v1 · doi: 10.48550/arxiv.1804.08375 · pith_short_12: UKOBB5YEPNUB · pith_short_16: UKOBB5YEPNUBOZAC · pith_short_8: UKOBB5YE

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/UKOBB5YEPNUBOZACVOLO3T6GMP \
  | 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: a29c10f7047b68176402ab96edcfc663f6f725529572d285bef8c52e846137cd

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "18303bfe1cd10a718028837aea52505956af44a754ab7140c87961cd30a4cf0b",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2018-04-23T12:45:42Z",
    "title_canon_sha256": "e9e1e2b82906e19323357dfa38132f4368701a893562587715a1c117a55359a2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1804.08375",
    "kind": "arxiv",
    "version": 1
  }
}