Pith Number

pith:P7OFIMJH

pith:2025:P7OFIMJHA74GIFYFT6ETDDQVLO

not attested not anchored not stored refs pending

Beating full state tomography for unentangled spectrum estimation

Angelos Pelecanos, Ewin Tang, John Wright, Xinyu Tan

arxiv:2504.02785 v1 · 2025-04-03 · quant-ph · cs.CC · cs.DS

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{P7OFIMJHA74GIFYFT6ETDDQVLO}

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	2026-07-05T10:44:02.341889Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7fdc54312707f86417059f89318e155ba7219a14daf88901cddb44a6761ad9dc

Aliases

arxiv: 2504.02785 · arxiv_version: 2504.02785v1 · doi: 10.48550/arxiv.2504.02785 · pith_short_12: P7OFIMJHA74G · pith_short_16: P7OFIMJHA74GIFYF · pith_short_8: P7OFIMJH

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/P7OFIMJHA74GIFYFT6ETDDQVLO \
  | 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: 7fdc54312707f86417059f89318e155ba7219a14daf88901cddb44a6761ad9dc

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d0d409f09e2d9c0e30c06858e4d5de4e8db59cc9a4dc6edc6ab380ae1c8cfe92",
    "cross_cats_sorted": [
      "cs.CC",
      "cs.DS"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2025-04-03T17:29:12Z",
    "title_canon_sha256": "46cfe25cad5bb26af55ed23029f3dab26ab0f53538629896ac91af52b9559f25"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2504.02785",
    "kind": "arxiv",
    "version": 1
  }
}