Abstract
We study an N = 1 supersymmetric model in an S1 × R3 spacetime. We find that by choosing appropriate boundary conditions for the contributing fields supersymmetry can be preserved. However, if we add a hard supersymmetry breaking term, we observe that for small values of the length of the S1 dimension, supersymmetry remains unbroken and breaks spontaneously when the length exceeds a critical value. The final picture resembles the first-order phase transition picture. A toy cosmological application is discussed.
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