Pith Number

pith:ZT4BR63L

pith:2026:ZT4BR63LKZWKDYZMVGU263NJ2W

not attested not anchored not stored refs pending

Fundamental limitations on entanglement extraction from purity

Dagmar Bru{\ss}, Hermann Kampermann, Justus Neumann, Pedro Barrios Hita, Tulja Varun Kondra

arxiv:2605.29197 v1 · 2026-05-28 · 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{ZT4BR63LKZWKDYZMVGU263NJ2W}

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	2026-05-29T01:05:23.819799Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ccf818fb6b566ca1e32ca9a9af6da9d5910309f07c657140f7588319bbe6fd5a

Aliases

arxiv: 2605.29197 · arxiv_version: 2605.29197v1 · doi: 10.48550/arxiv.2605.29197 · pith_short_12: ZT4BR63LKZWK · pith_short_16: ZT4BR63LKZWKDYZM · pith_short_8: ZT4BR63L

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/ZT4BR63LKZWKDYZMVGU263NJ2W \
  | 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: ccf818fb6b566ca1e32ca9a9af6da9d5910309f07c657140f7588319bbe6fd5a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d2f05479a3e929fba2ecb1383e261f5b8f2e7e030730f05fec3a50495fba5a0b",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2026-05-28T00:16:27Z",
    "title_canon_sha256": "672d7a7db24f8053c0a8f165da0abebe878d2c71db1dcbc2b79b603b082ac2ea"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2605.29197",
    "kind": "arxiv",
    "version": 1
  }
}