We present a novel method for solving eigenvalue problems on a quantum computer based on spectroscopy. The method works by coupling a "probe" qubit to a set of system simulation qubits and then time evolving both the probe and the system under Hamiltonian dynamics. In this way, we simulate spectroscopy on a quantum computer. We test our method on the IBM quantum hardware for a simple single spin model and an interacting Kitaev chain model. For the Kitaev chain, we trace out the pseudo-topological phase boundary for a two-site model.
@article{arxiv.2202.12910,
title = {Simulating spectroscopy experiments with a superconducting quantum computer},
author = {John P. T. Stenger and Gilad Ben-Shach and David Pekker and Nicholas T. Bronn},
journal= {arXiv preprint arXiv:2202.12910},
year = {2023}
}