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In this expository note, we attempt to explain how gravitational redshift can be studied using both physical space methods (e.g. vectorfields) and microlocal methods (such as those used by Hintz–Vasy). The cosmological horizon of de Sitter space is presented as a simple model.

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Two Perspectives on Gravitational Redshift, with a Simple Example

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  • 发表日期：

    2025年

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  • Allen Juntao Fang,
  • Ethan Sussman

摘要

In this expository note, we attempt to explain how gravitational redshift can be studied using both physical space methods (e.g. vectorfields) and microlocal methods (such as those used by Hintz–Vasy). The cosmological horizon of de Sitter space is presented as a simple model.