A class of minimally modified gravity theories
A class of minimally modified gravity theories
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DOI：
10.1088/1475-7516/2017/10/033
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发表时间：
2017-08
影响因子：
6.4
通讯作者：
Chunshan Lin;S. Mukohyama
中科院分区：
文献类型：
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作者：
Chunshan Lin;S. Mukohyama
本文研究了一类引力作用量在失效函数中是线性的引力理论的哈密顿结构。我们推导出在这个类中的理论有两个或更少的局部物理自由度的充分必要条件。作为一个应用程序，我们然后找到几个具体的例子，修改后的重力理论，其中的总数量的当地物理自由度的重力部门是两个。
We investigate the Hamiltonian structure of a class of gravitational theories whose actions are linear in the lapse function. We derive the necessary and sufficient condition for a theory in this class to have two or less local physical degrees of freedom. As an application we then find several concrete examples of modified gravity theories in which the total number of local physical degrees of freedom in the gravity sector is two.