Symmetry breaking and tunneling dynamics of F=1 spinor Bose-Einstein condensates in a triple-well potential

► We demonstrate the phase diagram in a triple-well potential in (λn,λs) plane. ► We then illustrate distinct novel typical density profiles of symmetric and asymmetric ground states. ► We illustrate the novel tunneling dynamics in the distinct region of the phase diagram in (λn,λs) plane. ► The transistorlike behavior of spinor Bose-Einstein condensate in a triple-well potential is also demonstrated.