Pith Number

pith:RGA5JBFV

pith:2009:RGA5JBFVTM43R7U4NWCUROALZL

not attested not anchored not stored refs pending

The Algebraic Measure of a Hidden Markov Quantum Memory Channel

F. Petruccione, I. Akhalwaya, J. Wouters, M. Fannes

arxiv:0901.2528 v1 · 2009-01-16 · 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{RGA5JBFVTM43R7U4NWCUROALZL}

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	2026-05-18T03:48:46.815525Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8981d484b59b39b8fe9c6d8548b80bcac37b232cc081aa2c7a58caa4e3cf330e

Aliases

arxiv: 0901.2528 · arxiv_version: 0901.2528v1 · doi: 10.48550/arxiv.0901.2528 · pith_short_12: RGA5JBFVTM43 · pith_short_16: RGA5JBFVTM43R7U4 · pith_short_8: RGA5JBFV

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/RGA5JBFVTM43R7U4NWCUROALZL \
  | 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: 8981d484b59b39b8fe9c6d8548b80bcac37b232cc081aa2c7a58caa4e3cf330e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d127f14489c9bc496098e68b17c3366ef2e2fc9fd398bd3230553ab3c3fe9f86",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2009-01-16T16:53:22Z",
    "title_canon_sha256": "52769e7d9a09c30a86ee1d7676bbf66768f7d8847542838937c39e357e8df1f2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0901.2528",
    "kind": "arxiv",
    "version": 1
  }
}