Variation of Entanglement Entropy in Scattering Process
arXiv:1412.7894 · doi:10.1016/j.physletb.2015.02.028
Abstract
In a scattering process, the final state is determined by an initial state and an S-matrix. We focus on two-particle scattering processes and consider the entanglement between these particles. For two types initial states; i.e., an unentangled state and an entangled one, we calculate perturbatively the change of entanglement entropy from the initial state to the final one. Then we show a few examples in a field theory and in quantum mechanics.
arXiv comment13 pages; v2: refs. added
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