  Interfering electrons in a mesoscopic ring are irradiated with both classical
and nonclassical microwaves. The average intensity of the charges is calculated
as a function of time and it is found that it depends on the nature of the
irradiating electromagnetic field. For various quantum states of the
microwaves, the electron autocorrelation function is calculated and it shows
that the quantum noise of the external field affects the interference of the
charges. Two-mode entangled microwaves are also considered and the results are
compared with those of the corresponding separable state. In both cases, the
results depend on whether the ratio of the two frequencies is rational or
irrational.
