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Entanglement, Bell Inequalities and Decoherence in Particle Physics
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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.
Forward citations
Cited by 2 Pith papers
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Decoherence effects in entangled fermion pairs at colliders
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.
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Quantum Tomography in Neutral Meson and Antimeson Systems
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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