Fig. 1: Theoretical and experimental setup.
From: Quantum imaginary time evolution steered by reinforcement learning
a Quantum circuit of the quantum imaginary time evolution (QITE) for the transverse-field Ising model with 4 qubits and n Trotter steps. \({U}_{\hat{P}}^{j}\) represents the unitary operator that approximates \({e}^{-{{\Delta }}\tau \hat{P}}\) for the local Hamiltonian \(\hat{P}\) in the j-th Trotter step. b Molecule structure and nuclei parameters of the nuclear magnetic resonance processor. The molecule has four Carbon atoms C1, C2, C3, and C4. Diagonal entries of the table are the chemical shifts in Hz, off-diagonal entries of the table are the J-couplings between two corresponding nuclei. The T2 row gives the relaxation time of each nucleus. c A six-vertex complete graph with weighted edges. Different shades of gray represent different couplings in the Sherrington–Kirkpatrick model.
