Killing spinors are Killing vector fields in Riemannian Supergeometry

Details Killing spinors are Killing vector fields in Riemannian Supergeometry Killing spinors are Killing vector fields in Riemannian Supergeometry

1997-04-02

arxiv.org/abs/dg-ga/9704002v2

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

14 pages, latex, one typo corrected

Scientific paper

10.1016/S0393-0440(97)00036-3

A supermanifold M is canonically associated to any pseudo Riemannian spin manifold (M_0,g_0). Extending the metric g_0 to a field g of bilinear forms g(p) on T_p M, p\in M_0, the pseudo Riemannian supergeometry of (M,g) is formulated as G-structure on M, where G is a supergroup with even part G_0\cong Spin(k,l); (k,l) the signature of (M_0,g_0). Killing vector fields on (M,g) are, by definition, infinitesimal automorphisms of this G-structure. For every spinor field s there exists a corresponding odd vector field X_s on M. Our main result is that X_s is a Killing vector field on (M,g) if and only if s is a twistor spinor. In particular, any Killing spinor s defines a Killing vector field X_s.

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