Pith Number

pith:WRCL5MSG

pith:2002:WRCL5MSG5AGITZMQRUA6QKWEZI

not attested not anchored not stored refs pending

Direct estimations of linear and non-linear functionals of a quantum state

Artur K. Ekert, Carolina Moura Alves, Daniel K. L. Oi, L. C. Kwek, Michal Horodecki, Pawel Horodecki

arxiv:quant-ph/0203016 v1 · 2002-03-04 · 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{WRCL5MSG5AGITZMQRUA6QKWEZI}

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.

Cited by

2 papers in Pith

Imaginary pseudo entropy encodes temporal orientation

High-Precision Variational Quantum SVD via Classical Orthogonality Correction

Receipt and verification

First computed	2026-07-04T16:36:00.489174Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b444beb246e80c89e5908d01e82ac4ca2015de074b3311bfe658851ce16fd372

Aliases

arxiv: quant-ph/0203016 · arxiv_version: quant-ph/0203016v1 · doi: 10.48550/arxiv.quant-ph/0203016 · pith_short_12: WRCL5MSG5AGI · pith_short_16: WRCL5MSG5AGITZMQ · pith_short_8: WRCL5MSG

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/WRCL5MSG5AGITZMQRUA6QKWEZI \
  | 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: b444beb246e80c89e5908d01e82ac4ca2015de074b3311bfe658851ce16fd372

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d6b2419aab30ca984c54622f9abe3b6b09222fdf34f265df5acff235693e3c03",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "quant-ph",
    "submitted_at": "2002-03-04T21:37:32Z",
    "title_canon_sha256": "172ed5ab29d76aed9f024e168fde31c16e3fa5e66b1f1c8c89b20f6727cb0357"
  },
  "schema_version": "1.0",
  "source": {
    "id": "quant-ph/0203016",
    "kind": "arxiv",
    "version": 1
  }
}