Pith Number

pith:YYMSRQKW

pith:2012:YYMSRQKWWJMBLCVDPWYQMTA2GN

not attested not anchored not stored refs pending

Improved Four-state Continuous-variable Quantum Key Distribution with Long Secure Distance

Bingjie Xu, Hong Guo, Jian Yang, Xiang Peng

arxiv:1202.0883 v1 · 2012-02-04 · 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{YYMSRQKWWJMBLCVDPWYQMTA2GN}

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	2026-05-18T01:58:35.466331Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c61928c156b258158aa37db1064c1a33741055ac2235a42a4282d73f90700073

Aliases

arxiv: 1202.0883 · arxiv_version: 1202.0883v1 · doi: 10.48550/arxiv.1202.0883 · pith_short_12: YYMSRQKWWJMB · pith_short_16: YYMSRQKWWJMBLCVD · pith_short_8: YYMSRQKW

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/YYMSRQKWWJMBLCVDPWYQMTA2GN \
  | 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: c61928c156b258158aa37db1064c1a33741055ac2235a42a4282d73f90700073

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8d6f55dfc66bac49a656cb78811af2fda764bbdc742300da27ded4dc1fcfa39f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2012-02-04T09:26:37Z",
    "title_canon_sha256": "148084fe8af115f811bd43c3b303c1cf13a80340dee0b681b2c9cb8d21508b52"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1202.0883",
    "kind": "arxiv",
    "version": 1
  }
}