the disclosure relates to a method for providing a logic circuit element . the method includes arranging a series of josephson junctions between a first josephson junction and a second josephson junction , the first josephson junction having a first critical current and the second josephson junction having a second critical current ; providing a working current to the first josephson junction , the working current transmitting to the second josephson junction through the series of the josephson junctions ; wherein the working current is sufficiently high to trigger the second josephson junction while sufficiently low to not disturb super - conductivity of the series of intermediate josephson junctions .