Pith Number

pith:VCVTCNQP

pith:1999:VCVTCNQPI2NES46543E7UH2UI5

not attested not anchored not stored refs pending

Universal Fault-Tolerant Computation on Decoherence-Free Subspaces

Daniel A. Lidar, Dave Bacon, Julia Kempe, K.B. Whaley (UC Berkeley)

arxiv:quant-ph/9909058 v2 · 1999-09-18 · 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{VCVTCNQPI2NES46543E7UH2UI5}

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	2026-05-18T01:05:00.241979Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a8ab31360f469a4973dde6c9fa1f54474be3dd2bc04129ed7d7aedbc416dc9c0

Aliases

arxiv: quant-ph/9909058 · arxiv_version: quant-ph/9909058v2 · doi: 10.48550/arxiv.quant-ph/9909058 · pith_short_12: VCVTCNQPI2NE · pith_short_16: VCVTCNQPI2NES465 · pith_short_8: VCVTCNQP

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/VCVTCNQPI2NES46543E7UH2UI5 \
  | 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: a8ab31360f469a4973dde6c9fa1f54474be3dd2bc04129ed7d7aedbc416dc9c0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ec0a3c1469e842475087093a99e4f2edf4455e42fa3c845c4a5a01dc0fd0ec46",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "quant-ph",
    "submitted_at": "1999-09-18T00:26:31Z",
    "title_canon_sha256": "485801b924eded09eeb3bf3fe3c627fba9f5169741c2c6c2949f202b489b02f4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "quant-ph/9909058",
    "kind": "arxiv",
    "version": 2
  }
}