  We propose a setup for a quantitative test of the quantum fluctuation
theorem. It consists of a quantum conductor, driven by an external voltage
source, and a classical inductor-capacitor circuit. The work done on the system
by the voltage source can be expressed by the classical degrees of freedom of
the LC circuit, which are measurable by conventional techniques. In this way
the circuit acts as a classical detector to perform measurements of the quantum
conductor. We prove that this definition is consistent with the work
fluctuation theorem. The system under consideration is effectively described by
a Langevin equation with non-Gaussian white noise. Our analysis extends the
proof of the fluctuation theorem to this situation.
