Simulations show that Bhabha scattering can produce electron-positron pairs with near-maximal entanglement, and a two-target secondary-scattering scheme could in principle measure their spin correlations.
Quantum Entanglement of Moving Bodies
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We study the properties of quantum information and quantum entanglement in moving frames. We show that the entanglement between the spins and the momenta of two particles can be interchanged under a Lorentz transformation, so that a pair of particles that is entangled in spin but not momentum in one reference frame, may, in another frame, be entangled in momentum at the expense of spin-entanglement. Similarly, entanglement between momenta may be transferred to spin under a Lorentz transformation. While spin and momentum entanglement each is not Lorentz invariant, the joint entanglement of the wave function is.
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Testing spooky action between free-traveling electron-positron pairs
Simulations show that Bhabha scattering can produce electron-positron pairs with near-maximal entanglement, and a two-target secondary-scattering scheme could in principle measure their spin correlations.