Pith Number

pith:SYYFWNZ3

pith:2020:SYYFWNZ3W4IE2SLVQ76GL6YALK

not attested not anchored not stored refs pending

Any Two Qubit State Has Non Zero Quantum Discord Under Global Unitary Operations

Biswajit Paul, Kaushiki Mukherjee, Sumana Karmakar

arxiv:2004.12991 v1 · 2020-04-27 · 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{SYYFWNZ3W4IE2SLVQ76GL6YALK}

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	2026-07-05T02:23:06.694332Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

96305b373bb7104d497587fc65fb005ab1fcdcbe19651908ea9ea3ded92b2dc7

Aliases

arxiv: 2004.12991 · arxiv_version: 2004.12991v1 · doi: 10.48550/arxiv.2004.12991 · pith_short_12: SYYFWNZ3W4IE · pith_short_16: SYYFWNZ3W4IE2SLV · pith_short_8: SYYFWNZ3

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/SYYFWNZ3W4IE2SLVQ76GL6YALK \
  | 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: 96305b373bb7104d497587fc65fb005ab1fcdcbe19651908ea9ea3ded92b2dc7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a5d995b2084883af53b25fe02114362b80d9ffcc3f6961840fe06be6a635ebe2",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2020-04-27T17:53:53Z",
    "title_canon_sha256": "ec409ca231f8615fe6738442c06ebc2f9ef7fb94fd85c07c48268a635474433e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2004.12991",
    "kind": "arxiv",
    "version": 1
  }
}