Quasi-classical rules for qubit spin-rotation error suppression

A frequently encountered source of systematic error in quantum computations is imperfections the control pulses which are classical fields that qubit gate operations. From an analysis mechanical time-evolution operator spin wavefunction, it has been demonstrated composite can mitigate certain errors and appealing geometric interpretation was developed for design error-suppressing pulses. Here we show these same pulse sequences be obtained within a quasi-classical framework. This raises question whether error-correction procedures exist exploit entanglement manner not reproduced formulation.