标题： lukewarm Reissner-Nordström-de Sitter时空的共形等距 显示英文标题

标题： Conformal isometry of the lukewarm Reissner-Nordström-de Sitter spacetime

摘要： 已知极端Reissner-Nordström黑洞具有一个离散的共形等距，该等距将黑洞视界与无限远交换。 也已知Reissner-Nordström-de Sitter时空具有类似的离散共形等距，该等距将黑洞的事件视界与宇宙学视界交换。 在本文中，我们将继续这一思路，并扩展后者的时空共形等距，并对负根给出一种非物理的解释。 显示英文摘要

摘要： It is known that the extremal Reissner-Nordstr\"om black hole possesses a discrete conformal isometry that exchanges the black hole horizon with infinity. It is also known that the Reissner-Nordstr\"om-de Sitter spacetime posseses a similar discrete conformal isometry which exchanges the event horizon of the black hole with the cosmological horizon. In this short paper we will continue this line of thought and extend the conformal isometry of the latter spacetime and give an unphysical interpretation of the negative root.