Pith Number

pith:5TYICPZQ

pith:2020:5TYICPZQCNYQY3K4QGTUUE2SRN

not attested not anchored not stored refs pending

Free fermions behind the disguise

Adrian Chapman, Samuel J. Elman, Steven T. Flammia

arxiv:2012.07857 v2 · 2020-12-14 · quant-ph · cond-mat.stat-mech · cond-mat.str-el · hep-th · math-ph · math.MP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{5TYICPZQCNYQY3K4QGTUUE2SRN}

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

3 papers in Pith

Free fermions in disguise without exponential degeneracies

On the Complexity of the Succinct State Local Hamiltonian Problem

Free fermionic and parafermionic multispin quantum chains with non-homogeneous interacting ranges

Receipt and verification

First computed	2026-07-05T03:29:46.870357Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ecf0813f3013710c6d5c81a74a13528b52a9579e563cbcc9e065a7cab279d678

Aliases

arxiv: 2012.07857 · arxiv_version: 2012.07857v2 · doi: 10.48550/arxiv.2012.07857 · pith_short_12: 5TYICPZQCNYQ · pith_short_16: 5TYICPZQCNYQY3K4 · pith_short_8: 5TYICPZQ

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/5TYICPZQCNYQY3K4QGTUUE2SRN \
  | 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: ecf0813f3013710c6d5c81a74a13528b52a9579e563cbcc9e065a7cab279d678

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a43238e11afbbbda9be12bbd10584f713161409f6ce9974fc278bf938d67918f",
    "cross_cats_sorted": [
      "cond-mat.stat-mech",
      "cond-mat.str-el",
      "hep-th",
      "math-ph",
      "math.MP"
    ],
    "license": "http://creativecommons.org/licenses/by-sa/4.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2020-12-14T19:00:01Z",
    "title_canon_sha256": "1727b93b85ee36bf5b7eda5b3f32db66de6f3d5288eb5a10f11c15e56d74ae4e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2012.07857",
    "kind": "arxiv",
    "version": 2
  }
}