Figure 1

Schematic depiction of the hybrid approach used in the VQT algorithm. The action of the variational circuits \(VQC_{1}\) and \(VQC_{2}\) and the measurements are performed on the quantum device. The results of the measurements are then sent to the classical device, which is depicted in grey. This information allows one to construct the cost function and propose a new value for the variational parameters using one’s optimizer of choice