  We present the first experimental study of unpinning a spiral wave of
excitation using a circularly polarized electric field. The experiments are
conducted in the Belousov-Zhabotinsky(BZ) reaction, and the system is modeled
using the Oregenator model. The mechanism of unpinning in the BZ reaction
differs from that in the physiological medium. We show that the wave unpins
when the electric force opposes the propagation of the spiral wave. We
developed an analytical relation of the unpinning phase with the initial phase,
the pacing ratio, and the field strength and verified the same.
