Pith Number

pith:NDL5CTS6

pith:2018:NDL5CTS6VH46BE4JALQILSVVJR

not attested not anchored not stored refs pending

PT-symmetric photonic quantum systems with gain and loss do not exist

Alexander Szameit, Stefan Scheel

arxiv:1805.10876 v1 · 2018-05-28 · quant-ph · physics.optics

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{NDL5CTS6VH46BE4JALQILSVVJR}

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	2026-05-18T00:09:13.723621Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

68d7d14e5ea9f9e0938902e085cab54c41c1d85fdefd1bf224b7cc808f0b0646

Aliases

arxiv: 1805.10876 · arxiv_version: 1805.10876v1 · doi: 10.48550/arxiv.1805.10876 · pith_short_12: NDL5CTS6VH46 · pith_short_16: NDL5CTS6VH46BE4J · pith_short_8: NDL5CTS6

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/NDL5CTS6VH46BE4JALQILSVVJR \
  | 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: 68d7d14e5ea9f9e0938902e085cab54c41c1d85fdefd1bf224b7cc808f0b0646

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2f2d6bd011a5c20582ad49fa6a48176cdc6a3a7e88b96deacb19a9dea7bf10a9",
    "cross_cats_sorted": [
      "physics.optics"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2018-05-28T11:48:18Z",
    "title_canon_sha256": "917b87fbe3240f2ecee3993268e2586557f63862bbc1ee9fdb8cc8d05888ddbb"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1805.10876",
    "kind": "arxiv",
    "version": 1
  }
}