Pith Number

pith:K2SMUVIQ

pith:2020:K2SMUVIQYMJSCHV6M3TLY5GBFC

not attested not anchored not stored refs pending

Variational Quantum Algorithms for Trace Distance and Fidelity Estimation

Ranyiliu Chen, Xin Wang, Xuanqiang Zhao, Zhixin Song

arxiv:2012.05768 v3 · 2020-12-10 · quant-ph · cs.IT · math-ph · math.IT · math.MP · math.OC

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{K2SMUVIQYMJSCHV6M3TLY5GBFC}

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	2026-07-05T03:43:38.524571Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

56a4ca5510c313211ebe66e6bc74c128a5440843a403e0789546a60604c0e9fd

Aliases

arxiv: 2012.05768 · arxiv_version: 2012.05768v3 · doi: 10.48550/arxiv.2012.05768 · pith_short_12: K2SMUVIQYMJS · pith_short_16: K2SMUVIQYMJSCHV6 · pith_short_8: K2SMUVIQ

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/K2SMUVIQYMJSCHV6M3TLY5GBFC \
  | 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: 56a4ca5510c313211ebe66e6bc74c128a5440843a403e0789546a60604c0e9fd

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e2cf99a6dbe265dbf1ccb7417fb7ddaf94447645fbda1ef931ab72dc114523bc",
    "cross_cats_sorted": [
      "cs.IT",
      "math-ph",
      "math.IT",
      "math.MP",
      "math.OC"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2020-12-10T15:56:58Z",
    "title_canon_sha256": "7c67bd57b9834f5a648f873aa39b149ae84b215cccb1a070fe5a84d0acb6d7af"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2012.05768",
    "kind": "arxiv",
    "version": 3
  }
}