Pith Number

pith:PPBTW23U

pith:2013:PPBTW23UW7ZMHGIJSEIWJPQEZA

not attested not anchored not stored refs pending

Block entropy for Kitaev-type spin chains in a transverse field

V. Subrahmanyam

arxiv:1307.0311 v2 · 2013-07-01 · quant-ph · cond-mat.str-el

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{PPBTW23UW7ZMHGIJSEIWJPQEZA}

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	2026-05-18T02:52:32.412482Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7bc33b6b74b7f2c39909911164be04c8038577e994190c84673257fe746b23bb

Aliases

arxiv: 1307.0311 · arxiv_version: 1307.0311v2 · doi: 10.48550/arxiv.1307.0311 · pith_short_12: PPBTW23UW7ZM · pith_short_16: PPBTW23UW7ZMHGIJ · pith_short_8: PPBTW23U

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/PPBTW23UW7ZMHGIJSEIWJPQEZA \
  | 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: 7bc33b6b74b7f2c39909911164be04c8038577e994190c84673257fe746b23bb

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "df646cfe70705c602b8d174cad64788637bac11c78eef6d865415f857c8ee386",
    "cross_cats_sorted": [
      "cond-mat.str-el"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2013-07-01T09:30:02Z",
    "title_canon_sha256": "a2405feb06791049fb5264c18fa398f8f332e80c10fd71bd540ef4a4eec77be5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1307.0311",
    "kind": "arxiv",
    "version": 2
  }
}