Analogue and non-analogue Monte Carlo

Analogue Monte Carlo. One particle is followed event by event. This is the standard way to transport particles as shown in figure 5.1. This method is correct if the number of histories is large enough.

Non-analogue Monte Carlo. Only interesting particles are followed: each time a particle is an interesting one, it is multiplied into Q particles with a weight

1 IQ. This method decreases the statistical error, but could introduce a bias in the results.