The Square of the Dirac and spin-Dirac Operators on a Riemann-Cartan Space(time)

Details The Square of the Dirac and spin-Dirac Operators on a Riemann-Cartan Space(time) The Square of the Dirac and spin-Dirac Operators on a Riemann-Cartan Space(time)

2007-03-18

arxiv.org/abs/math-ph/0703052v2

Rept.Math.Phys.60:135-157,2007

Physics

Mathematical Physics

Scientific paper

10.1016/S0034-4877(07)80105-4

In this paper we introduce the Dirac and spin-Dirac operators associated to a connection on Riemann-Cartan space(time) and standard Dirac and spin-Dirac operators associated with a Levi-Civita connection on a Riemannian (Lorentzian) space(time) and calculate the square of these operators, which play an important role in several topics of modern Mathematics, in particular in the study of the geometry of moduli spaces of a class of black holes, the geometry of NS-5 brane solutions of type II supergravity theories and BPS solitons in some string theories. We obtain a generalized Lichnerowicz formula, decompositions of the Dirac and spin-Dirac operators and their squares in terms of the standard Dirac and spin-Dirac operators and using the fact that spinor fields (sections of a spin-Clifford bundle) have representatives in the Clifford bundle we present also a noticeable relation involving the spin-Dirac and the Dirac operators.

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