Dynamics for a mesoscopic RLC circuit with a source

The dynamical problem of a mesoscopic RLC circuit with a source ruled by a time-dependent Hermitian Hamiltonian is exactly solved by algebraic method. The dynamical variations of the charge and current in a mesoscopic RLC cir cuit with a de or ac source are studied in detail. In particluar, we have s hown that squeezed coherent states of light held can be generated in a meso scopic RLC circuit driven by an external source, although their quantum sta tistical properties are not dependent of the external source.