Pith Number

pith:5BJRU7MH

pith:2010:5BJRU7MHNXTGAUJ7W6VJJYXK74

not attested not anchored not stored refs pending

Communication at the quantum speed limit along a spin chain

Michael Murphy, Simone Montangero, Tommaso Calarco, Vittorio Giovannetti

arxiv:1004.3445 v1 · 2010-04-20 · 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{5BJRU7MHNXTGAUJ7W6VJJYXK74}

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	2026-05-18T04:41:05.014456Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e8531a7d876de660513fb7aa94e2eaff3f26dbc0ff7db7d0a4a1aede3cbe6c6d

Aliases

arxiv: 1004.3445 · arxiv_version: 1004.3445v1 · doi: 10.48550/arxiv.1004.3445 · pith_short_12: 5BJRU7MHNXTG · pith_short_16: 5BJRU7MHNXTGAUJ7 · pith_short_8: 5BJRU7MH

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/5BJRU7MHNXTGAUJ7W6VJJYXK74 \
  | 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: e8531a7d876de660513fb7aa94e2eaff3f26dbc0ff7db7d0a4a1aede3cbe6c6d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8ca8aa4957ecfd858c5eea792a7bed133e6c628a93b2670855a68a09453e07fa",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2010-04-20T13:32:25Z",
    "title_canon_sha256": "a4d62beb0bf510e5cb0afc29e7afa7eabe630542ba1a75553d6bd5d97166b75e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1004.3445",
    "kind": "arxiv",
    "version": 1
  }
}