MESOSCOPIC JOSEPHSON-JUNCTIONS IN THE PRESENCE OF 2-MODE QUANTIZED ELECTROMAGNETIC-FIELD

Dynamic behavior of a mesoscopic Josephson junction in the presence of a two-mode quantized electromagnetic field is investigated. It is sho wn that the current voltage-step structures depend apparently on the t wo basic frequencies of the two-mode field. The voltage jumps are gene rally not equidistant. It is also shown that for the correlated two-mo de squeezed state the time evolution of the supercurrent exhibits quan tum collapse and revival(CR) phenomenon, while for the noncorrelated t wo-mode coherent state the phenomenon does not occur.