NONEQUILIBRIUM FLUCTUATIONS IN ACTIVELY COOLED RESONATORS

We analyze heat and work fluctuations in the gravitational wave detector AURIGA [Zendri et al., 2002], modeled as a macroscopic electromechanical oscillator in contact with a thermostat and cooled by an active feedback system. The oscillator is driven to a steady state by the feedback cooling, equivalent to a viscous force.