Pith Number

pith:WXUB2G47

pith:2019:WXUB2G472P2BINEY4Y7ED4DLPR

not attested not anchored not stored refs pending

Bipartite entanglement entropy of the excited states of the free fermions and the harmonic oscillators

Arash Jafarizadeh, M. A. Rajabpour

arxiv:1907.09806 v2 · 2019-07-23 · cond-mat.str-el · 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{WXUB2G472P2BINEY4Y7ED4DLPR}

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	2026-07-05T00:18:38.653280Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b5e81d1b9fd3f4143498e63e41f06b7c521d3d9d64561d1aef4aa7f0517fb6ee

Aliases

arxiv: 1907.09806 · arxiv_version: 1907.09806v2 · doi: 10.48550/arxiv.1907.09806 · pith_short_12: WXUB2G472P2B · pith_short_16: WXUB2G472P2BINEY · pith_short_8: WXUB2G47

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/WXUB2G472P2BINEY4Y7ED4DLPR \
  | 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: b5e81d1b9fd3f4143498e63e41f06b7c521d3d9d64561d1aef4aa7f0517fb6ee

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ddeaba4e9f742ca0969b5a6c7ce949bb4917f9c8eab971810c0d5e03e1541ad4",
    "cross_cats_sorted": [
      "hep-th",
      "quant-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cond-mat.str-el",
    "submitted_at": "2019-07-23T10:31:38Z",
    "title_canon_sha256": "232562dc8428de1bed14c99d6830bae81a2e78fdedb1535b65be18a60b919b3a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1907.09806",
    "kind": "arxiv",
    "version": 2
  }
}