Quantum computation of magnon spectra
Strongly Correlated Electrons
2020-02-11 v2 Quantum Physics
Abstract
We demonstrate quantum computation of two-point correlation functions for a Heisenberg spin chain. Using the IBM Q 20 quantum machines, we find that for two sites the correlation functions produce the exact results reliably. For four sites, results from the IBM Q 20 Tokyo quantum computer are noisy due to read out errors and decoherence. Nevertheless, the correlation functions retain the correct spectral information. This is illustrated in the frequency domain by accurately extracting the magnon energies from peaks in the spectral function.
Keywords
Cite
@article{arxiv.1909.05701,
title = {Quantum computation of magnon spectra},
author = {Akhil Francis and J. K. Freericks and A. F. Kemper},
journal= {arXiv preprint arXiv:1909.05701},
year = {2020}
}
Comments
6 pages, 8 figures