Pith Number

pith:56WKHWP3

pith:2006:56WKHWP35XSGYVHYWONRI32EZ3

not attested not anchored not stored refs pending

Can one build a quantum hard drive? A no-go theorem for storing quantum information in equilibrium systems

Michal Horodecki, Robert Alicki

arxiv:quant-ph/0603260 v1 · 2006-03-28 · 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{56WKHWP35XSGYVHYWONRI32EZ3}

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	2026-07-04T14:54:07.227619Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

efaca3d9fbede46c54f8b39b146f44cecbe96fe5bee226cb489c33b641cf71e4

Aliases

arxiv: quant-ph/0603260 · arxiv_version: quant-ph/0603260v1 · doi: 10.48550/arxiv.quant-ph/0603260 · pith_short_12: 56WKHWP35XSG · pith_short_16: 56WKHWP35XSGYVHY · pith_short_8: 56WKHWP3

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/56WKHWP35XSGYVHYWONRI32EZ3 \
  | 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: efaca3d9fbede46c54f8b39b146f44cecbe96fe5bee226cb489c33b641cf71e4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "daebbd83a7b51bb8cab29545c078366e835614de8493448b4e5d3653f29881f1",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "quant-ph",
    "submitted_at": "2006-03-28T20:56:37Z",
    "title_canon_sha256": "c90920fcfba64708c66c08f5eab91a0c4208ef42e6a875a55403cc8a13699b4a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "quant-ph/0603260",
    "kind": "arxiv",
    "version": 1
  }
}