Detection of energy levels of a spin system on a quantum computer by probe spin evolution

Probing mean values and correlations of high-spin systems on a quantum computer

“…Using this protocol, an evolution of the one-dimensional transverse Ising spin model was simulated on a quantum computer. Recently, a method for determining energy levels of quantum systems on a quantum computer was proposed [25,26]. This method is based on the study of the mean value of a physical quantity when its operator anticommutes with the Hamiltonian of a system.…”

“…The geometry of the states prepared on the quantum computers was studied in paper [31]. The spin-1 tunneling was studied both on a digital simulator [32,33] and a quantum computer [34]. In paper [34] splitting energy levels as a result of tunneling were additionally considered.…”