论文标题
部分可观测时空混沌系统的无模型预测
Hidden symmetries from distortions of the conformal structure
论文作者
论文摘要
众所周知,在大地运动的情况下,质量参数破坏了保形的对称性。当考虑非零用测量学时,适当的保形杀伤向量停止产生保守的电荷。我们研究了质量的引入实际上与保形部门中适当扭曲的外观有关,这导致了新的保护法。作为一个突出的例子,我们使用了一般的PP-WAVE度量,该指标将此属性充分至最大值。我们研究必要的几何条件,以便适用这种类型的扭曲。我们表明,相对向量是异构变换的发生器,并证明了它们与高阶(隐藏)对称性的连接。除了从PP波段的几何形状外,我们还以DE Sitter度量的形式提供了一个附加示例。同样,可以适当地扭曲适当的保形杀伤向量,以生成大量大地测量的保守量。随后,我们通过引入附加的对称破坏效果来进行。后者是通过考虑Bogoslovsky类型的线条元素来实现的,该元素涉及违反参数的Lorentz。我们再次利用PP波案例作为研究损坏的对称性的指南 - 这次也与杀死媒介有关 - 被原始发电机的扭曲代替。我们进一步分析并讨论导致这些扭曲出现的必要几何条件。
It is well established that the mass parameter breaks the conformal symmetries in the case of geodesic motion. The proper conformal Killing vectors cease to generate conserved charges when non-null geodesics are considered. We examine how the introduction of the mass is actually related to the appearance of appropriate distortions in the conformal sector, which lead to new conservation laws. As a prominent example we use a general pp-wave metric, which exploits this property to the maximum. We study the necessary geometric conditions, so that such types of distortions are applicable. We show that the relative vectors are generators of disformal transformations and prove their connection to higher order (hidden) symmetries. Except from the pp-wave geometry, we also provide an additional example in the form of the de Sitter metric. Again, the proper conformal Killing vectors can be appropriately distorted to generate conserved quantities for massive geodesics. Subsequently, we proceed by introducing an additional symmetry breaking effect. The latter is realized by considering a Bogoslovsky type of line-element, which involves a Lorentz violating parameter. We utilize once more the pp-wave case as a guide to study how the broken symmetries - this time also related to Killing vectors - are substituted by distortions of the original generators. We further analyze and discuss the necessary geometric conditions that lead to the emergence of these distortions.