Transport in out-of-equilibrium XXZ chains: Nonballistic behavior and correlation functions

@article{Piroli2017TransportIO,
  title={Transport in out-of-equilibrium XXZ chains: Nonballistic behavior and correlation functions},
  author={Lorenzo Piroli and Jacopo de Nardis and Mario Collura and Bruno Bertini and Maurizio Fagotti},
  journal={Physical Review B},
  year={2017},
  volume={96},
  pages={115124}
}
We consider the nonequilibrium protocol where two semi-infinite gapped XXZ chains, initially prepared in different equilibrium states, are suddenly joint together. At large times, a generalized hydrodynamic description applies, according to which the system can locally be represented by space- and time- dependent stationary states. The magnetization displays an unusual behavior: depending on the initial state, its profile may exhibit abrupt jumps that can not be predicted directly from the… 

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