Abstract
Using parafermionic field-theoretical methods, the fundamentals of two-dimensional (2D) fractional supersymmetry QK = P are set up. Known difficulties induced by methods based on the Uq(sl(2)) quantum group representations and non-commutative geometry are avoided in the parafermionic approach. Moreover, we find that fractional supersymmetric algebras are naturally realized as matrix models. The K = 3 case is studied in detail. Links between 2D ((1/3),0) and (((1/3))2,0) fractional supersymmetries and N = 2 U(1) and N = 4 su(2) standard supersymmetries, respectively, are exhibited. Field-theoretical models describing the self-couplings of the matter multiplets (02,((1/3))2,((2/3))2) and (04,((1/3))4,((2/3))4) are given.
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