Effects of the noise on voltage-current characteristics of Josephson effect

In the case of T much greater than (h) over bar w/k, by expanding the quasi particle current power spectrum up to the third order term of (h) over bar w/2kT, two noises are obtained: one is a white noise, the other is an O-U n oise. We find that the two noises are the negative correlated noises, and c orrelation parameter lambda is equal to -root 6 /3. Effects of the correlat ed noises on voltage-current characteristics curve are studied. The numeric al computations show that the correlation parameter lambda has very large e ffects on the voltage-current characteristics, but the correlation time tau of the O-U noise has a little effect.