论文标题
循环量子重力中的黑洞模型
Black-hole models in loop quantum gravity
论文作者
论文摘要
动态的黑洞情景以各种方式在循环量子重力中开发，结合了迷你和中端空间模型的结果。过去，时空的基本几何形状通常以与经典相对性的经典解决方案不同的指标成分来表示，这是由修改的运动和约束方程激励的。但是，最近的结果表明，这些结构中的大多数违反了一般的协方差和切片独立性。因此，排除了建议的线元素和黑洞模型。逃脱该句子的唯一可能性是不仅得出修改的度量组件，而且还会得出一种新的时空结构，该结构在广义上是协方差的。正式地，通过分析规范重力的约束，该派生可提供，该分析会在时空中产生超出表面的变形，或者如果始终修改约束，则可以在时空或广义版本中产生变形。这里描述了对黑洞的影响。 [缩写摘要]
Dynamical black-hole scenarios have been developed in loop quantum gravity in various ways, combining results from mini and midisuperspace models. In the past, the underlying geometry of space-time has often been expressed in terms of line elements with metric components that differ from the classical solutions of general relativity, motivated by modified equations of motion and constraints. However, recent results have shown by explicit calculations that most of these constructions violate general covariance and slicing independence. The proposed line elements and black-hole models are therefore ruled out. The only known possibility to escape this sentence is to derive not only modified metric components but also a new space-time structure which is covariant in a generalized sense. Formally, such a derivation is made available by an analysis of the constraints of canonical gravity, which generate deformations of hypersurfaces in space-time, or generalized versions if the constraints are consistently modified. Implications for black holes are described here. [Abbreviated abstract]
