for the exchange operator, respectively. As fitness function we used f i = exp(-αρ i ) with ρ i being the the normalized energy and chose particles for procreation by a probability directly proportional to to their fitness. To maintain the diversity of the population particles with a duplicate energy were filtered out immediately after creation. Especially when including the local optimization procedure this was necessary as a multitude of particles will result in the exact same local minimum. We note that each step is more demanding for the GA, where the calculated fitness of each candidate also involves estimating the structural diversity of the population.