  We study transport in coherent conductors driven by a time-periodic bias
voltage. We present results of the charge and energy noise and complement them
by a study of the mixed noise, namely the zero-frequency correlator between
charge and energy current. The mixed noise presents interference contributions
and transport contributions, showing features different from those of charge
and energy noise. The mixed noise can be accessed by measuring the correlator
between the fluctuations of the power provided to the system and the charge
current.
