Cooper pairs are merely the charge carriers in a superconductor. One stores quantum information in the oscillating supercurrent and voltage of a superconducting

Cooper pairs are merely the charge carriers in a superconductor. One stores quantum information in the oscillating supercurrent and voltage of a superconducting nonlinear resonator. The nonlinearity is contributed by a Josephson junction. There is a qubit called a cooper pair box but it’s not really used anymore.