EXACT SOLUTION FOR THE CHARGE SOLITON IN A 2N-TURNSTILE

On the basis of the exact solution for the potential profile of a 2N-t urnstile with equal junction capacitances C and coupling capacitance C -0, we obtain the explicit expressions for the total free energy as we ll as the corresponding charging energy, barrier height on the middle island, and threshold voltage. It is shown that the charging energy, t he barrier height, and the threshold voltage are very sensitive to the number of junctions and the value C-0/C.