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arXiv 1602.02309hep-thgr-qc
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超引力背景与对称超代数

Supergravity backgrounds and symmetry superalgebras

Ümit Ertem

摘要:

我们考虑十维和十一维超引力理论的玻色子部分,它们对应于弦论和M理论的低能极限。超引力场方程的解被称为超引力背景,在这些背景中保持的超对称性的数目由Killing旋量决定。我们提供了一些超引力背景的例子,这些超引力背景保持了超对称性的不同部分。超引力背景的一个重要不变量是由背景的Killing向量和Killing旋量构成的Killing超代数。在构造了某些特殊超引力背景下的Killing超代数之后,讨论了这些超代数的扩张包含背景的高次隐对称的可能性。

英文摘要:

We consider the bosonic sectors of supergravity theories in ten and eleven dimensions which correspond to the low energy limits of string theories and M-theory. The solutions of supergravity field equations are known as supergravity backgrounds and the number of preserved supersymmetries in those backgrounds are determined by Killing spinors. We provide some examples of supergravity backgrounds which preserve different fractions of supersymmetry. An important invariant for the characterization of supergravity backgrounds is their Killing superalgebras which are constructed out of Killing vectors and Killing spinors of the background. After constructing Killing superalgebras of some special supergravity backgrounds, we discuss about the possibilities of the extensions of these superalgebras to include the higher degree hidden symmetries of the background.

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