Pith Number

pith:RW3ZX4SQ

pith:2015:RW3ZX4SQ3EXEGQOQQJ7ENBTRCQ

not attested not anchored not stored refs pending

Exact finite reduced density matrix and von Neumann entropy for the Calogero model

Anna Okopi\'nska, Federico M. Pont, Omar Osenda, Pablo Serra

arxiv:1510.03644 v1 · 2015-10-13 · 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{RW3ZX4SQ3EXEGQOQQJ7ENBTRCQ}

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	2026-05-18T01:19:29.299771Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8db79bf250d92e4341d0827e468671140629bf2722e1f0b14f95a865c055f261

Aliases

arxiv: 1510.03644 · arxiv_version: 1510.03644v1 · doi: 10.48550/arxiv.1510.03644 · pith_short_12: RW3ZX4SQ3EXE · pith_short_16: RW3ZX4SQ3EXEGQOQ · pith_short_8: RW3ZX4SQ

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/RW3ZX4SQ3EXEGQOQQJ7ENBTRCQ \
  | 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: 8db79bf250d92e4341d0827e468671140629bf2722e1f0b14f95a865c055f261

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d6634d09b3032361a61c59e30ff81e77b4d3d34c5d6d9b5f514ec5ef6f1beab9",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2015-10-13T12:18:55Z",
    "title_canon_sha256": "bead5a3e44c1808ba2b458b3faa016bc4b929efe646b69765e5b32ead5a16a00"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1510.03644",
    "kind": "arxiv",
    "version": 1
  }
}