Pith Number

pith:S5Q652W5

pith:2010:S5Q652W5LNIQ7LQY5HOTO6QG6F

not attested not anchored not stored refs pending

Purification of Mixed State with Closed Timelike Curve is not Possible

Arun K. Pati, Indranil Chakrabarty, Pankaj Agrawal

arxiv:1003.4221 v2 · 2010-03-22 · quant-ph · gr-qc

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{S5Q652W5LNIQ7LQY5HOTO6QG6F}

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	2026-05-18T03:57:50.838519Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9761eeeadd5b510fae18e9dd377a06f167daa04a38255d98d736c3fea84a6e65

Aliases

arxiv: 1003.4221 · arxiv_version: 1003.4221v2 · doi: 10.48550/arxiv.1003.4221 · pith_short_12: S5Q652W5LNIQ · pith_short_16: S5Q652W5LNIQ7LQY · pith_short_8: S5Q652W5

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/S5Q652W5LNIQ7LQY5HOTO6QG6F \
  | 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: 9761eeeadd5b510fae18e9dd377a06f167daa04a38255d98d736c3fea84a6e65

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e14c7dbfdbb4ab99041a381a1ef5e26eaa13319b57cf27aa68589ea8aabe0636",
    "cross_cats_sorted": [
      "gr-qc"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2010-03-22T17:36:59Z",
    "title_canon_sha256": "2b1a73af130a5e44ac5bb60b5568c18b9dbb7d355cad7444eba4b93874a54e6f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1003.4221",
    "kind": "arxiv",
    "version": 2
  }
}