This perturbative data can be connected to non - perturbative data with the help of the perturbative - non - perturbative relation ( 2.9 ) . The difference from the SUSY double - well example , with broken SUSY , discussed in section 2.1 is that in the SUSY Sine - Gordon system , with unbroken SUSY , there are two saddles contributing to the non - perturbative ground - state energy : a real bion and a complex bion [ 18,19 ] . The real bion reduces the ground state energy , while the complex bion increases it by exactly same amount , resulting in a cancellation :