Out-of-time ordered correlators and entanglement growth in the random-field XX spin chain

  title={Out-of-time ordered correlators and entanglement growth in the random-field XX spin chain},
  author={Jonathon Riddell and Erik S. S{\o}rensen},
  journal={Physical Review B},
We study out of time order correlations, $C(x,t)$ and entanglement growth in the random field XX model with open boundary conditions using the exact Jordan-Wigner transformation to a fermionic Hamiltonian. For any non-zero strength of the random field this model describes an Anderson insulator. Two scenarios are considered: A global quench with the initial state corresponding to a product state of the Neel form, and the behaviour in a typical thermal state at $\beta=1$. As a result of the… Expand
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