Pith Number

pith:HSLH5VML

pith:2026:HSLH5VMLXMSANGFUMSKR2KC2OS

not attested not anchored not stored refs pending

Polarization, Maximal Concurrence, and Pure States in High-Energy Collisions

Bo-Wen Xiao, Luo-Ting He, Wei Qi, Yu-Xuan Liu

Increasing local spin polarization imposes an upper bound on concurrence in two-qubit systems.

arxiv:2604.17756 v2 · 2026-04-20 · hep-ph · hep-ex · nucl-th · quant-ph

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\pithnumber{HSLH5VMLXMSANGFUMSKR2KC2OS}

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Record completeness

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4 Citations open

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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.

Claims

C1strongest claim

We establish a quantitative relation between local spin polarization and quantum entanglement in two-qubit systems by deriving an upper bound on the concurrence at fixed local polarization, showing that increasing polarization constrains the maximum achievable entanglement. We further demonstrate that this bound is saturated by pure states in certain cases.

C2weakest assumption

The assumption that the spin degrees of freedom of the final-state quarks in e+e- to Z to qqbar can be faithfully modeled as a two-qubit system with a well-defined local polarization vector that directly enters the concurrence bound.

C3one line summary

Local spin polarization imposes an upper bound on concurrence in two-qubit systems that is saturated by pure states, and this bound lowers maximal entanglement in the polarized e+e- to Z to qqbar process relative to the unpolarized case.

Cited by

1 paper in Pith

Controlling Quantum discord and steering in Electron-Positron Annihilation Using Polarized Beams

Receipt and verification

First computed	2026-05-25T02:02:15.479470Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3c967ed58bbb240698b464951d285a7480c5470afbcaf1c8166fad8921714d15

Aliases

arxiv: 2604.17756 · arxiv_version: 2604.17756v2 · doi: 10.48550/arxiv.2604.17756 · pith_short_12: HSLH5VMLXMSA · pith_short_16: HSLH5VMLXMSANGFU · pith_short_8: HSLH5VML

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/HSLH5VMLXMSANGFUMSKR2KC2OS \
  | 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: 3c967ed58bbb240698b464951d285a7480c5470afbcaf1c8166fad8921714d15

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d16a6cb4ac22aba427c828c072416b4c30085c3c14fd24022cf16969e7f506e5",
    "cross_cats_sorted": [
      "hep-ex",
      "nucl-th",
      "quant-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "hep-ph",
    "submitted_at": "2026-04-20T03:17:43Z",
    "title_canon_sha256": "edc11cffa43d2d521112576ed57f78469a981f3fc18cde52ee0020874b4d2850"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2604.17756",
    "kind": "arxiv",
    "version": 2
  }
}