Generation of two-axis countertwisting squeezed spin states via Uhrig dynamical decoupling

We propose a scheme to generate two-axis countertwisting squeezed spin states from a one-axis twisting Hamiltonian via Uhrig dynamical decoupling. The proposed scheme significantly reduces the number of control pulses or requires shorter evolution time compared to previous proposals. The minimum number of applied pulses changes relative to the spin number almost linearly. The proposed scheme significantly relieves the experimental demand on the applied pulses or the evolution time, and we expect it would be within the reach of current spin squeezing experiment.