Pith Number

pith:ZBKKT6P6

pith:2009:ZBKKT6P6EHYQMJVR5MCJK27FUV

not attested not anchored not stored refs pending

Asymptotic Efficiency and Finite Sample Performance of Frequentist Quantum State Estimation

Anisha Ghosh, Raj Chakrabarti

arxiv:0904.1628 v2 · 2009-04-10 · 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{ZBKKT6P6EHYQMJVR5MCJK27FUV}

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	2026-05-18T04:08:22.440992Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c854a9f9fe21f10626b1eb04956be5a57b346ab9d202d4070676a77dfc1ff434

Aliases

arxiv: 0904.1628 · arxiv_version: 0904.1628v2 · doi: 10.48550/arxiv.0904.1628 · pith_short_12: ZBKKT6P6EHYQ · pith_short_16: ZBKKT6P6EHYQMJVR · pith_short_8: ZBKKT6P6

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/ZBKKT6P6EHYQMJVR5MCJK27FUV \
  | 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: c854a9f9fe21f10626b1eb04956be5a57b346ab9d202d4070676a77dfc1ff434

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c121ad1e2b8a63f718ad3f390d2fda3d1b1f852faff5ee44a1eb5f9a500e579b",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2009-04-10T04:32:15Z",
    "title_canon_sha256": "da9bd9a73889579c5a33d7245da1084ebb8ada22201b5ac1d8d2e6404749f065"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0904.1628",
    "kind": "arxiv",
    "version": 2
  }
}