https://doi.org/10.1140/epjp/s13360-022-02753-0
Regular Article
Detection of energy levels of a spin system on a quantum computer by probe spin evolution
1
Professor Ivan Vakarchuk Department for Theoretical Physics, Ivan Franko National University of Lviv, 12, Drahomanov St., 79005, Lviv, Ukraine
2
Department of Applied Physics and Nanomaterials Science, Lviv Polytechnic National University, 5 Ustiyanovych St., 79013, Lviv, Ukraine
a
khrystyna.gnatenko@gmail.com
Received:
6
January
2022
Accepted:
21
April
2022
Published online:
30
April
2022
We propose a method for detection of energy levels of arbitrary spin system on a quantum computer based on studies of evolution of only one probe spin. On the basis of the proposed method energy levels of spin systems are found on IBM’s quantum computer ibmq-bogota, among them are spin chain in magnetic field, triangle spin cluster, Ising model on squared lattice, a spin in magnetic field. The results of quantum calculations are in agreement with the theoretical ones. The method is efficient for estimation of the energy levels of many-spin systems and opens a possibility to achieve quantum supremacy in solving eigenvalue problem with development of multi-qubit quantum computers.
Detection of energy levels of a spin system on a quantum computer.
© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2022
