T. Ojanen and T. Heikkilä.
Collaborator: Dmitri Averin
We consider the measurement of a quantum two-level system through a harmonic oscillator coupled to it. The aim is to study how the two-level-system changes the correlators of the oscillator and how the oscillator dephases the two-level system. We study different types of couplings and look for the possibility to do quantum nondemolition measurements.