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Entanglement, Bell Inequalities and Decoherence in Particle Physics

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arxiv quant-ph/0410028 v2 pith:NFHUS4G6 submitted 2004-10-04 quant-ph hep-ph

classification quant-phhep-ph
keywords decoherenceentanglementbellentangledinequalitiessystemsystemsparticle
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abstract

We demonstrate the relevance of entanglement, Bell inequalities and decoherence in particle physics. In particular, we study in detail the features of the ``strange'' $K^0 \bar K^0$ system as an example of entangled meson--antimeson systems. The analogies and differences to entangled spin--1/2 or photon systems are worked, the effects of a unitary time evolution of the meson system is demonstrated explicitly. After an introduction we present several types of Bell inequalities and show a remarkable connection to CP violation. We investigate the stability of entangled quantum systems pursuing the question how possible decoherence might arise due to the interaction of the system with its ``environment''. The decoherence is strikingly connected to the entanglement loss of common entanglement measures. Finally, some outlook of the field is presented.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Decoherence effects in entangled fermion pairs at colliders

    quant-ph 2025-04 unverdicted novelty 7.0 of 10

    Calculates decoherence from radiation on a Bell-state fermion pair by mapping integrated Altarelli-Parisi splitting functions to Kraus operators of an open quantum system.

  2. Quantum Tomography in Neutral Meson and Antimeson Systems

    hep-ph 2025-07 conditional novelty 6.0 of 10

    The complete flavor density matrix of a neutral meson-antimeson pair can be reconstructed from time-dependent semileptonic decay rates, with B_s^0 and K^0 the most favorable systems.

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