Comment on: "On the characteristic polynomial of an effective Hamiltonian"
Quantum Physics
2024-12-17 v2
Abstract
We show that a method proposed recently, based on the characteristic polynomial of an effective Hamiltonian, had been developed several years earlier by other authors in a clearer and more general way. We outline both implementations of the approach and compare them by means of the calculation of the exceptional point closest to origin for a toy model.
Cite
@article{arxiv.2209.10112,
title = {Comment on: "On the characteristic polynomial of an effective Hamiltonian"},
author = {Francisco M. Fernández},
journal= {arXiv preprint arXiv:2209.10112},
year = {2024}
}