Pith Number

pith:BVQX2BFX

pith:2020:BVQX2BFXPKIDZ2XRJEZHALE5WR

not attested not anchored not stored refs pending

Nonlinear Improvement of Qubit-qudit Entanglement Witnesses

Jin-Min Liang, Juan Yu, Ming Li, Shao-Ming Fei, Shu-Qian Shen

arxiv:2001.05269 v1 · 2020-01-15 · 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{BVQX2BFXPKIDZ2XRJEZHALE5WR}

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	2026-07-05T00:33:40.656968Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0d617d04b77a903ceaf14932702c9db44e41ce6f32b43ecf4c2ef4527f67db98

Aliases

arxiv: 2001.05269 · arxiv_version: 2001.05269v1 · doi: 10.48550/arxiv.2001.05269 · pith_short_12: BVQX2BFXPKID · pith_short_16: BVQX2BFXPKIDZ2XR · pith_short_8: BVQX2BFX

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/BVQX2BFXPKIDZ2XRJEZHALE5WR \
  | 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: 0d617d04b77a903ceaf14932702c9db44e41ce6f32b43ecf4c2ef4527f67db98

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c7cc7fe2f6431a2a9de5ab10b9831f0445f7c8de10308b4544a14d96cefcdf26",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2020-01-15T12:29:55Z",
    "title_canon_sha256": "023e2345140d9a6b7f79e221075cd9d1c0f27f747e6c61530f34c2c39fdf9c59"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2001.05269",
    "kind": "arxiv",
    "version": 1
  }
}