Supersymmetric quantum theory and non-commutative geometry

Classical differential geometry can be encoded in spectral data, such as Co nnes' spectral triples, involving supersymmetry algebras. In this paper, we formulate non-commutative geometry in terms of supersymmetric spectral dat a. This leads to generalizations of Connes' non-commutative spin geometry e ncompassing noncommutative Riemannian, symplectic, complex-Hermitian and (H yper-) Kahler,geometry. A general framework for non-commutative geometry is developed from the point of view of supersymmetry and illustrated in terms of examples. In particular, the noncommutative torus and the non-commutati ve 3-sphere are studied in some detail.