Pith Number

pith:WDHCA7EF

pith:2019:WDHCA7EFZLIEOEB5LLMLQ5HAKY

not attested not anchored not stored refs pending

Hardness and Ease of Curing the Sign Problem for Two-Local Qubit Hamiltonians

Barbara Terhal, Itay Hen, Joel Klassen, Marios Ioannou, Milad Marvian, Stephen Piddock

arxiv:1906.08800 v2 · 2019-06-20 · 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{WDHCA7EFZLIEOEB5LLMLQ5HAKY}

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	2026-07-05T00:52:46.546667Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b0ce207c85cad047103d5ad8b874e0562df21be5eefb43f7c796c9e5eab33e3d

Aliases

arxiv: 1906.08800 · arxiv_version: 1906.08800v2 · doi: 10.48550/arxiv.1906.08800 · pith_short_12: WDHCA7EFZLIE · pith_short_16: WDHCA7EFZLIEOEB5 · pith_short_8: WDHCA7EF

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/WDHCA7EFZLIEOEB5LLMLQ5HAKY \
  | 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: b0ce207c85cad047103d5ad8b874e0562df21be5eefb43f7c796c9e5eab33e3d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "484d54f3c550fec0fd69336e66c18162966ab05d8ddb44bec02b9ea29418a0c3",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2019-06-20T18:26:35Z",
    "title_canon_sha256": "78daec6851bfc6e614bab50aa84bbdbe9a539e953cc93f5495078e6b2ffc8dbf"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1906.08800",
    "kind": "arxiv",
    "version": 2
  }
}