Pith Number

pith:EJSW527C

pith:2011:EJSW527C6IFQ3BDIRJVKULOV5Z

not attested not anchored not stored refs pending

Observable estimation of entanglement of formation and quantum discord for bipartite mixed quantum states

Chengjie Zhang, C.H. Oh, Qing Chen, Sixia Yu

arxiv:1107.5458 v3 · 2011-07-27 · 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{EJSW527C6IFQ3BDIRJVKULOV5Z}

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	2026-05-18T02:01:08.988160Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

22656eebe2f20b0d84688a6aaa2dd5ee5f4f28e5f9044dc43f6cc373d843ad0d

Aliases

arxiv: 1107.5458 · arxiv_version: 1107.5458v3 · doi: 10.48550/arxiv.1107.5458 · pith_short_12: EJSW527C6IFQ · pith_short_16: EJSW527C6IFQ3BDI · pith_short_8: EJSW527C

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/EJSW527C6IFQ3BDIRJVKULOV5Z \
  | 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: 22656eebe2f20b0d84688a6aaa2dd5ee5f4f28e5f9044dc43f6cc373d843ad0d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "848593c1b61de81bdb74683fbe27bc05d8484ea5a9406012398bf7e45f412d72",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2011-07-27T12:42:56Z",
    "title_canon_sha256": "898936427abee0cf4f9c73e369a2b36b9fe983f3d5eba8647d32f4f2e40fd028"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1107.5458",
    "kind": "arxiv",
    "version": 3
  }
}