几乎Kahler变元下的Einstein引力与具有非完整分布和非对称分布的引力的稳定性
Einstein Gravity in Almost Kahler Variables and Stability of Gravity with Nonholonomic Distributions and Nonsymmetric Metrics
摘要：
我们认为，爱因斯坦引力理论可以在几乎Kahler（非对称）变量与有效的辛形式和兼容的线性连接唯一定义的（伪）黎曼度量。分析了一类流形上的非对称引力理论（NGT），使之具有非完整分布。考虑了当基本几何和物理对象由广义相对论中的非完整变形或由Ricci流理论和/或量子引力的贡献确定/修改时的一些条件。我们证明，在这样的NGT，对于某些类的非完整约束，有建模的有效拉格朗日不发展不稳定性。还阐述了非完整NGT模型的线性化形式，并分析了固定椭球解的稳定性，定义了一些非完整和/或非对称变形的史瓦西度规。我们展示了如何构建非完整分布，消除不稳定性NGT。最后，我们得出结论，不稳定性不包括一个一般特征的引力理论与非对称度量，但特定的属性的某些模型和/或类的无约束的解决方案。
英文摘要：
We argue that the Einstein gravity theory can be reformulated in almost Kahler (nonsymmetric) variables with effective symplectic form and compatible linear connection uniquely defined by a (pseudo) Riemannian metric. A class of nonsymmetric theories of gravitation (NGT) on manifolds enabled with nonholonomic distributions is analyzed. There are considered some conditions when the fundamental geometric and physical objects are determined/ modified by nonholonomic deformations in general relativity or by contributions from Ricci flow theory and/or quantum gravity. We prove that in such NGT, for certain classes of nonholonomic constraints, there are modelled effective Lagrangians which do not develop instabilities. It is also elaborated a linearization formalism for anholonomic NGT models and analyzed the stability of stationary ellipsoidal solutions defining some nonholonomic and/or nonsymmetric deformations of the Schwarzschild metric. We show how to construct nonholonomic distributions which remove instabilities in NGT. Finally we conclude that instabilities do not consist a general feature of theories of gravity with nonsymmetric metrics but a particular property of certain models and/or classes of unconstrained solutions.
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