Pith Number

pith:HF7YMXDD

pith:2019:HF7YMXDDCTG2Y3ZEH3CSD3Y2KX

not attested not anchored not stored refs pending

Time-optimal purification of a qubit in contact with a structured environment

Christiane P. Koch, Daniel Basilewitsch, Dominique Sugny, Jonas Fischer

arxiv:1901.05756 v1 · 2019-01-17 · 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{HF7YMXDDCTG2Y3ZEH3CSD3Y2KX}

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	2026-05-17T23:51:30.250864Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

397f865c6314cdac6f243ec521ef1a55c41e439db2dec10b8da52545f61e5ad1

Aliases

arxiv: 1901.05756 · arxiv_version: 1901.05756v1 · doi: 10.48550/arxiv.1901.05756 · pith_short_12: HF7YMXDDCTG2 · pith_short_16: HF7YMXDDCTG2Y3ZE · pith_short_8: HF7YMXDD

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/HF7YMXDDCTG2Y3ZEH3CSD3Y2KX \
  | 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: 397f865c6314cdac6f243ec521ef1a55c41e439db2dec10b8da52545f61e5ad1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "afeae2568bf84b39649e932702b14c4905ee17af04728c89c8397dcdf884d370",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2019-01-17T12:26:06Z",
    "title_canon_sha256": "8a6d9e57d8b30ae9d6c3f9f3bf75bb26b4fb3acbc1e06974dbaaed1dbc274b72"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1901.05756",
    "kind": "arxiv",
    "version": 1
  }
}