Pith Number

pith:QQ4G2CUS

pith:2009:QQ4G2CUS4NNXK3SBH7Y6WGNYUH

not attested not anchored not stored refs pending

Optimal Simulation of a Perfect Entangler

Mingsheng Ying, Nengkun Yu, Runyao Duan

arxiv:0907.2733 v2 · 2009-07-16 · 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{QQ4G2CUS4NNXK3SBH7Y6WGNYUH}

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	2026-05-18T03:12:46.820919Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

84386d0a92e35b756e413ff1eb19b8a1c792e1fe0c8bdd60e4b2e6d1009deaac

Aliases

arxiv: 0907.2733 · arxiv_version: 0907.2733v2 · doi: 10.48550/arxiv.0907.2733 · pith_short_12: QQ4G2CUS4NNX · pith_short_16: QQ4G2CUS4NNXK3SB · pith_short_8: QQ4G2CUS

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/QQ4G2CUS4NNXK3SBH7Y6WGNYUH \
  | 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: 84386d0a92e35b756e413ff1eb19b8a1c792e1fe0c8bdd60e4b2e6d1009deaac

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "41228fb9cd646a1e366243b881580faa8af1fc79a393aac65cbd55356d89d401",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2009-07-16T02:24:56Z",
    "title_canon_sha256": "eb0fd4086b3c6c429e82579b659441733902ff7778006d5c556f8b338cbda133"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0907.2733",
    "kind": "arxiv",
    "version": 2
  }
}