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arXiv 1604.05415gr-qc
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约束理论中的可观测量类型

On Types of Observables in Constrained Theories

Edward Anderson

摘要:

库查尔观测量的概念只适用于有限范围的理论。关系力学,稍微不均匀的宇宙学和超引力被用作例子,需要进一步的观测量的概念。一个适当的一般概念的A-可观的,然后给出涵盖所有这些情况。这里的“A”代表“代数子结构”; A-可观测量可以通过与理论约束的每个封闭代数子结构的关联来定义。约束代数结构和相关的概念的A-可观形成有界格。

英文摘要:

The Kuchar observables notion is shown to apply only to a limited range of theories. Relational mechanics, slightly inhomogeneous cosmology and supergravity are used as examples that require further notions of observables. A suitably general notion of A-observables is then given to cover all of these cases. `A' here stands for `algebraic substructure'; A-observables can be defined by association with each closed algebraic substructure of a theory's constraints. Both constrained algebraic structures and associated notions of A-observables form bounded lattices.

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