Pith Number

pith:4TQDY7UM

pith:2005:4TQDY7UMELSD5KB35MNM3C3AAZ

not attested not anchored not stored refs pending

Characterization of multiqubit pure-state entanglement

Quanhua Xu, Zeqian Chen

arxiv:quant-ph/0505166 v2 · 2005-05-23 · 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{4TQDY7UMELSD5KB35MNM3C3AAZ}

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	2026-05-18T01:37:57.803481Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e4e03c7e8c22e43ea83beb1acd8b600658d13c39bccac62361dadbc9f1bd5101

Aliases

arxiv: quant-ph/0505166 · arxiv_version: quant-ph/0505166v2 · doi: 10.48550/arxiv.quant-ph/0505166 · pith_short_12: 4TQDY7UMELSD · pith_short_16: 4TQDY7UMELSD5KB3 · pith_short_8: 4TQDY7UM

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/4TQDY7UMELSD5KB35MNM3C3AAZ \
  | 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: e4e03c7e8c22e43ea83beb1acd8b600658d13c39bccac62361dadbc9f1bd5101

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d8ad1f5ecbff295b19db0f80585164f5aef08e99f16280fbd2bd5d86d5d01463",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2005-05-23T01:42:04Z",
    "title_canon_sha256": "af0be9ce3c113b26d2ce2a7b5b01ae6034703c278fbacdae5da1da4e86ed7dd4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "quant-ph/0505166",
    "kind": "arxiv",
    "version": 2
  }
}