Pith Number

pith:PSE4LNXS

pith:2013:PSE4LNXSOCBGPUIFMXCCPOAI2B

not attested not anchored not stored refs pending

Quantum Fisher information for states in exponential form

Zhang Jiang

arxiv:1310.2687 v3 · 2013-10-10 · 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{PSE4LNXSOCBGPUIFMXCCPOAI2B}

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	2026-05-18T02:53:41.001918Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7c89c5b6f2708267d10565c427b808d048f9dc2894432ec3f745077a6271b221

Aliases

arxiv: 1310.2687 · arxiv_version: 1310.2687v3 · doi: 10.48550/arxiv.1310.2687 · pith_short_12: PSE4LNXSOCBG · pith_short_16: PSE4LNXSOCBGPUIF · pith_short_8: PSE4LNXS

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/PSE4LNXSOCBGPUIFMXCCPOAI2B \
  | 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: 7c89c5b6f2708267d10565c427b808d048f9dc2894432ec3f745077a6271b221

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "91d650b2e3e539c88b2a879d31038ffa24f584f078144e773c6229fe2a59b474",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2013-10-10T02:55:27Z",
    "title_canon_sha256": "67104ccf75db76891fef93812fd80b4889ef4964249cd48ff8ed84727cf0a9bd"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1310.2687",
    "kind": "arxiv",
    "version": 3
  }
}