Pith Number

pith:VXTW4TWH

pith:2013:VXTW4TWHQFEHPF4BXYAHE2F54C

not attested not anchored not stored refs pending

Complexity of measurement of a qubit pair

Constantin V. Usenko

arxiv:1309.6155 v1 · 2013-09-24 · 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{VXTW4TWHQFEHPF4BXYAHE2F54C}

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	2026-05-18T03:12:23.686267Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ade76e4ec78148779781be007268bde0a7e2ae2d2828b8b865084463609de832

Aliases

arxiv: 1309.6155 · arxiv_version: 1309.6155v1 · doi: 10.48550/arxiv.1309.6155 · pith_short_12: VXTW4TWHQFEH · pith_short_16: VXTW4TWHQFEHPF4B · pith_short_8: VXTW4TWH

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/VXTW4TWHQFEHPF4BXYAHE2F54C \
  | 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: ade76e4ec78148779781be007268bde0a7e2ae2d2828b8b865084463609de832

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "dc144b9ecd62e0019fa7d222d5e4c837ca2897de154c66ab43528e14c4d33d4b",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2013-09-24T13:39:21Z",
    "title_canon_sha256": "49d0721e7d72041895be728403cd0a849078ef918d5a197912e956a0e571f0ce"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1309.6155",
    "kind": "arxiv",
    "version": 1
  }
}