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arXiv math-ph/0703052math-phmath.DGmath.MP
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Riemann-Cartan空间(时间)上Dirac和spin-Dirac算子的平方

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

E. A. Notte-Cuello, W. A. Rodrigues, Q. A. G. de Souza

摘要:

本文介绍了Riemann-Cartan空间(时间)上的Dirac算子和spin-Dirac算子,以及Riemann-Cartan空间(时间)上的Levi-Civita联络上的标准Dirac算子和spin-Dirac算子(洛伦兹)空间(时间)和计算这些算子的平方,这些算子在现代数学的几个主题中发挥着重要作用,特别是在研究一类黑洞模空间的几何、第二类超引力理论NS-5膜解的几何以及某些弦论中的BPS孤子等方面。我们得到了一个推广的Lichnerowicz公式,Dirac和自旋-Dirac算子及其平方的分解,并利用旋量场(自旋-Clifford丛的截面)在Clifford丛中有代表这一事实,我们还提出了一个涉及自旋-Dirac和Dirac算子的值得注意的关系。

英文摘要:

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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