Exponential damping induced by random and realistic perturbations.

  title={Exponential damping induced by random and realistic perturbations.},
  author={J. Richter and F. Jin and Lars Knipschild and H. De Raedt and K. Michielsen and J. Gemmer and R. Steinigeweg},
  journal={Physical review. E},
  volume={101 6-1},
  • J. Richter, F. Jin, +4 authors R. Steinigeweg
  • Published 2020
  • Physics, Medicine
  • Physical review. E
  • Given a quantum many-body system and the expectation-value dynamics of some operator, we study how this reference dynamics is altered due to a perturbation of the system's Hamiltonian. Based on projection operator techniques, we unveil that if the perturbation exhibits a random-matrix structure in the eigenbasis of the unperturbed Hamiltonian, then this perturbation effectively leads to an exponential damping of the original dynamics. Employing a combination of dynamical quantum typicality and… CONTINUE READING
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