  A Monte Carlo simulation on the basis of quantum trajectory approach is
carried out for the measurement dynamics of a single electron spin resonance.
The measured electron, which is confined in either a quantum dot or a defect
trap, is tunnel-coupled to a side reservoir and continuously monitored by a
mesoscopic detector. The simulation not only recovers the observed telegraphic
signal of detector current, but also predicts unique features in the output
power spectrum which are associated with electron dynamics in different
regimes.
