Author

Yoshitaka Hatta

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Preprint Aug 2026

Three-qubit entanglement in the Bethe-Heitler process

The familiar Bethe-Heitler process on the proton target $e+p\to e+p+\gamma$ is transformed into a laboratory for studying multiparticle entanglement. We discuss how bipartite and genuine tripartite entanglement between the final state electron, proton and photon are built up by successive $1\to 2$ and $2\to 2$ elementa...

Hao-Tian Cao, Yu-Xun Guo, Yoshitaka Hatta et al. · 0 citations

Preprint Aug 2026

Photon-nucleon entanglement in Compton scattering at low and high energies

We study spin-spin entanglement in the final state photon-nucleon system in Compton scattering, both at low energy below the pion threshold and at high energy in perturbative QCD to next-to-leading order. We first establish a no-go theorem showing that, for any spin-$\frac{1}{2}$ target, entanglement cannot be generate...

Yoshitaka Hatta, V. Mart'inez-Fern'andez · 0 citations