More specifically, starting from the top five configurations with small 𝐸 ! and 𝐸 " values for each independent FMQA optimization run, further relaxation calculations were performed, which have the same accuracy as those performed using 𝐸 # . The total energies obtained by the highly accurate relaxation calculations are summarized in Figure . As a result, it was confirmed that stable configurations with a value equivalent to the total energy obtained from the FMQA optimizations performed using 𝐸 # could be obtained from the optimizations using 𝐸 " . This implies that by performing FMQA optimization using 𝐸 " , followed by further relaxation for a small number of stable configurations, the computation time can be reduced to obtain stable proton configurations.