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We review the dynamical generation of coupling constants in 4D supergravity by means of gauge three‐form fields. The latter are introduced as components of particular chiral supermultiplets and can be coupled to membranes preserving local supersymmetry. Such a set‐up naturally arises from type‐II string compactifications on Calabi–Yau manifolds with fluxes. We present generic 4D    N  =  1    supergravity models with three‐form multiplets and study domain wall solutions supported by membranes, which interpolate between vacua with different values of the cosmological constant.

Higher Forms and Membranes in 4D Supergravities