Fig. 7. Possible system sizes.

We show the required time for BYND for different time steps 1500 and 3000 respectively. Calculations have been performed on Intel(R) Xeon(R) Silver 4210R CPUs @ 2.40GHz. The total time of our approach consists of the time required for the SMA plus the time for the three time-dependent density functional theory (RT-TDDFT) short-time dynamics runs. For the high resolution long-time dynamics simulation, the total required computational time is the cost for three RT-TDDFT runs with 20,000 time steps each. Unfilled markers and dashed line represent additional nanocrystal systems (see Supplementary Fig. 21) where we have used the RT-TDDFT wall-time estimates provided by FHIaims to predict their computational cost.