Designing pretty good state transfer via isospectral reductions

@article{Rntgen2020DesigningPG,
  title={Designing pretty good state transfer via isospectral reductions},
  author={M. R{\"o}ntgen and N. E. Palaiodimopoulos and C. V. Morfonios and Ioannis Brouzos and Maxim Pyzh and Fotis K. Diakonos and Peter Schmelcher},
  journal={Physical Review A},
  year={2020}
}
We present an algorithm to design networks that feature pretty good state transfer (PGST), which is of interest for high-fidelity transfer of information in quantum computing. Realizations of PGST networks have so far mostly relied either on very special network geometries or imposed conditions such as transcendental on-site potentials. However, it was recently shown that PGST generally arises when a network's eigenvectors and the factors ${P}_{\ifmmode\pm\else\textpm\fi{}}$ of its… 

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