Concurrence for two Unruh-DeWitt detectors is computed in a superposition of two quotient Minkowski spacetimes, showing enhanced entanglement and an enlarged twisted-field entanglement region.
Entanglement harvesting from the electromagnetic vacuum with hydrogenlike atoms
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abstract
We study how two fully-featured hydrogenlike atoms harvest entanglement from the electromagnetic field vacuum, even when the atoms are spacelike separated. We compare the electromagnetic case ---qualitatively and quantitatively--- with previous results that used scalar fields and featureless, idealized atomic models. Our study reveals the new traits that emerge when we relax these idealizations, such as anisotropies in entanglement harvesting and the effect of exchange of angular momentum. We show that, under certain circumstances, relaxing previous idealizations makes vacuum entanglement harvesting more efficient.
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Entanglement harvesting in quantum superposed spacetime
Concurrence for two Unruh-DeWitt detectors is computed in a superposition of two quotient Minkowski spacetimes, showing enhanced entanglement and an enlarged twisted-field entanglement region.