Pith Number

pith:XLKB4SEC

pith:1996:XLKB4SECQLDE7FC3GTHPJVTECB

not attested not anchored not stored refs pending

A General Fidelity Limit for Quantum Channels

Benjamin Schumacher, Christopher A. Fuchs, Howard Barnum, Richard Jozsa

arxiv:quant-ph/9603014 v1 · 1996-03-08 · 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{XLKB4SECQLDE7FC3GTHPJVTECB}

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	2026-05-18T01:05:02.112552Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

bad41e488282c64f945b34cef4d6641074f938d3a408471574ac6fa4c5a6015c

Aliases

arxiv: quant-ph/9603014 · arxiv_version: quant-ph/9603014v1 · doi: 10.48550/arxiv.quant-ph/9603014 · pith_short_12: XLKB4SECQLDE · pith_short_16: XLKB4SECQLDE7FC3 · pith_short_8: XLKB4SEC

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/XLKB4SECQLDE7FC3GTHPJVTECB \
  | 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: bad41e488282c64f945b34cef4d6641074f938d3a408471574ac6fa4c5a6015c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "bc379760076d6c131515c49fcd3e4faeb11c1755698a53968df0121c4acff357",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "quant-ph",
    "submitted_at": "1996-03-08T20:32:57Z",
    "title_canon_sha256": "e69699e1deb2df98f3810d7c38ed4d0f75828d92ea2ed0a0f0fd10c8848b3dca"
  },
  "schema_version": "1.0",
  "source": {
    "id": "quant-ph/9603014",
    "kind": "arxiv",
    "version": 1
  }
}