...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>International journal of modern physics, D. Gravitation, astrophysics, cosmology >Dark energy and modified gravity in degenerate higher-order scalar-tensor (DHOST) theories: A review
【24h】

Dark energy and modified gravity in degenerate higher-order scalar-tensor (DHOST) theories: A review

机译：暗能和改性重力在退化高阶标量张（DHOST）理论：综述

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

This paper reviews scalar-tensor theories characterized by a Lagrangian that, despite the presence of second-order derivatives, contains a single scalar degree of freedom. These theories, known as Degenerate Higher-Order Scalar-Tensor (DHOST) theories, include Horndeski and Beyond Horndeski theories. They propagate a single scalar mode as a consequence of the degeneracy of their Lagrangian and, therefore, are not plagued by an Ostrogradsky instability. They have been fully classified up to cubic order in second-order derivatives. The study of their phenomenological consequences restricts the subclass of DHOST theories that are compatible with observations. In cosmology, these theories can be described in the language of the unified effective approach to dark energy and modified gravity. Compact objects in the context of DHOST theories are also discussed.
机译：本文评论Scalar-Tensor理论，其特征在于拉格朗日，尽管存在二阶衍生物，但包含单标量的自由度。 这些理论，称为退化的高阶标量张（DHOST）理论，包括Horndeski及其超越Horndeski理论。 它们由于他们的拉格朗日的退化而传播了单个标量模式，因此，不会被ostrogradsky不稳定困扰。 他们已在二阶衍生品中完全分类为立方命令。 他们的现象学后果的研究限制了与观察结果兼容的DHOST理论的子类。 在宇宙学中，这些理论可以用统一的有效方法的语言描述为暗能和修改的重力。 还讨论了DHOST理论背景下的紧凑型对象。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号