Long-term memory magnetic correlations in the Hubbard model: A dynamical mean-field theory analysis

@article{Watzenbock2021LongtermMM,
  title={Long-term memory magnetic correlations in the Hubbard model: A dynamical mean-field theory analysis},
  author={Clemens Watzenbock and Martina Fellinger and Karsten Held and Alessandro Toschi},
  journal={SciPost Physics},
  year={2021}
}
We investigate the onset of a not-decaying asymptotic behavior of temporal magnetic correlations in the Hubbard model in infinite dimensions. This long-term memory feature of dynamical spin correlations can be precisely quantified by computing the difference between the zero-frequency limit of the Kubo susceptibility and the corresponding static isothermal one. Here, we present a procedure for reliably evaluating this difference starting from imaginary time-axis data, and apply it to the… 

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