2468100001e51e61e71e81e91e101e11bit-flip time T_x (exponential)phase-flip time T_z (linear in 1/|alpha|^2)bias 10^3bias 10^6cat size |alpha|^2 (mean photon number)error timescale (ms)Bit flips are suppressed exponentially; phase flips grow to pay for itbit-flip time T_x (exponential)phase-flip time T_z (linear in 1/|alpha|^2)