Figure 3
Temperature decrease in a iso-entropic process. (a) The relative temperature decrease Tf /Ti as a function of phase \({\phi }_{f}\) of the junction, where Ti is the initial temperature at \({\phi }_{i}=0\). Different curves refer to different initial temperature Ti/Tc at a fixed \(a=100\). (b) shows the ratio \(\zeta ({T}_{i})={T}_{f}/{T}_{i}\) for an iso-entropic process \(({T}_{i},{\phi }_{i}=0)\to ({T}_{f},{\phi }_{f}=\pi )\), as a function of initial temperature Ti. Different curves refer to different values of a. Solid lines correspond to numerical solutions of Usadel equations; dashed lines correspond to analytic results obtained within the KO theory. The KO theory and the full numeric solution are in good agreement at \(a={10}^{2},{10}^{3}\); deviations appear for lower values of a.
