Effect of rare fluctuations on the thermalization of isolated quantum systems.

@article{Biroli2010EffectOR,
  title={Effect of rare fluctuations on the thermalization of isolated quantum systems.},
  author={Giulio Biroli and Corinna Kollath and A. M. L{\"a}uchli},
  journal={Physical review letters},
  year={2010},
  volume={105 25},
  pages={250401}
}
We consider the question of thermalization for isolated quantum systems after a sudden parameter change, a so-called quantum quench. In particular, we investigate the prerequisites for thermalization, focusing on the statistical properties of the time-averaged density matrix and of the expectation values of observables in the final eigenstates. We find that eigenstates, which are rare compared to the typical ones sampled by the microcanonical distribution, are responsible for the absence of… CONTINUE READING
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