Pith Number

pith:2HWHIBL7

pith:1998:2HWHIBL7TZB5QB6V4KDNLKZAWY

not attested not anchored not stored refs pending

Quantum state transformation by dispersive and absorbing four-port devices

D.-G. Welsch, E. Schmidt, L. Knoell, S. Scheel

arxiv:quant-ph/9806077 v1 · 1998-06-23 · 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{2HWHIBL7TZB5QB6V4KDNLKZAWY}

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	2026-07-04T16:10:59.267546Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d1ec74057f9e43d807d5e286d5ab20b617990fe730e43cf40c29f9e914f0b4fc

Aliases

arxiv: quant-ph/9806077 · arxiv_version: quant-ph/9806077v1 · doi: 10.48550/arxiv.quant-ph/9806077 · pith_short_12: 2HWHIBL7TZB5 · pith_short_16: 2HWHIBL7TZB5QB6V · pith_short_8: 2HWHIBL7

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/2HWHIBL7TZB5QB6V4KDNLKZAWY \
  | 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: d1ec74057f9e43d807d5e286d5ab20b617990fe730e43cf40c29f9e914f0b4fc

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "aac11baff4746aea62ffa4e52f5d957161cd101db87f31b27f7d29a73c5bd0f2",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "quant-ph",
    "submitted_at": "1998-06-23T15:17:06Z",
    "title_canon_sha256": "16b30b72fda3f8b3fad40be78f4aeba03e6e30a40c25e7cc4150076434988ddd"
  },
  "schema_version": "1.0",
  "source": {
    "id": "quant-ph/9806077",
    "kind": "arxiv",
    "version": 1
  }
}