James S. Douglas, Keith Burnett
We describe how quasi-classical relative positions emerge in initially delocalized quantum systems as scattering of probe particles is observed. We show that in the multi-particle case this localization in position space occurs via intermediate states with quantum superpositions of spatial configurations. These superpositions are robust to consecutive scattering events and scattering alone does not lead to their decoherence. Instead the free evolution of the system combines with scattering to destroy these superpositions leading to classical-like relative positions between the particles.
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http://arxiv.org/abs/1211.3167
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