Classical Branch Structure from Spatial Redundancy in a Many-Body Wave Function.

@article{Riedel2017ClassicalBS,
  title={Classical Branch Structure from Spatial Redundancy in a Many-Body Wave Function.},
  author={C. Jess Riedel},
  journal={Physical review letters},
  year={2017},
  volume={118 12},
  pages={
          120402
        }
}
When the wave function of a large quantum system unitarily evolves away from a low-entropy initial state, there is strong circumstantial evidence it develops "branches": a decomposition into orthogonal components that is indistinguishable from the corresponding incoherent mixture with feasible observations. Is this decomposition unique? Must the number of branches increase with time? These questions are hard to answer because there is no formal definition of branches, and most intuition is… CONTINUE READING
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