Pith Number

pith:7FBA7562

pith:2026:7FBA7562PGFLKX7UC4A5M7Z3QS

not attested not anchored not stored refs pending

Quantum Fisher information of the Klein--Gordon, $\phi^4$, and Dirac vacua

Alessio Serafini, Preslav Asenov

arxiv:2607.26919 v1 · 2026-07-29 · hep-th · 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{7FBA7562PGFLKX7UC4A5M7Z3QS}

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	2026-07-30T01:23:00.247159Z
Builder	pith-number-builder-2026-05-17-v1
Signature	unsigned_v0
Schema	pith-number/v1.0

Canonical hash

f9420ff7da798ab55ff41701d67f3b84b91ded88a10a97d9daff90329c1e6d3f

Aliases

arxiv: 2607.26919 · arxiv_version: 2607.26919v1 · doi: 10.48550/arxiv.2607.26919 · pith_short_12: 7FBA7562PGFL · pith_short_16: 7FBA7562PGFLKX7U · pith_short_8: 7FBA7562

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/7FBA7562PGFLKX7UC4A5M7Z3QS \
  | 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: f9420ff7da798ab55ff41701d67f3b84b91ded88a10a97d9daff90329c1e6d3f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "53c8f1960938f5c74c658d213860a30494a25c64c00ea8213fcbe12a975b366f",
    "cross_cats_sorted": [
      "quant-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "hep-th",
    "submitted_at": "2026-07-29T13:47:28Z",
    "title_canon_sha256": "8343c42e63aa81ea10272c32c7841e522f55ff99e0da230407b5e0f307097a4c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2607.26919",
    "kind": "arxiv",
    "version": 1
  }
}