买了一本书,《真空结构、引力起源与暗能量问题》,王顺金 著。

书很好,介绍了理论物理研究中最本质的问题的研究方向。吸引我的原因是,很少有资料对真空的构造进行研究,这本书以此为标题,内容果然涉及到了真空的微观构造。有人评价这本书,要么是民科般的自说自话,自己证明自己,要么就是具有远见卓识,找到了正确的研究方向。我认为是后者。因为这与我之前对空间的思考比较类似,也涉及到了黎曼曲面和网格分割类的相关数学知识。这条路不好走,但走通了就不一般了。

读书:《真空结构、引力起源与暗能量问题》

本文来自于维基百科  https://en.wikipedia.org/wiki/Quantum_gravity


Candidate theories

There are a number of proposed quantum gravity theories.[33] Currently, there is still no complete and consistent quantum theory of gravity, and the candidate models still need to overcome major formal and conceptual problems. They also face the common problem that, as yet, there is no way to put quantum gravity predictions to experimental tests, although there is hope for this to change as future data from cosmological observations and particle physics experiments becomes available.[34][35]

There are a number of other approaches to quantum gravity. The approaches differ depending on which features of general relativity and quantum theory are accepted unchanged, and which features are modified.[51][52] Examples include:

 

纪录片:In the Shadow of the Black Hole (在黑洞的阴影中)

原链接:https://www.youtube.com/watch?v=omz77qrDjsU


事件视界望远镜(EHT) – 通过国际合作锻造的八个地面射电望远镜的行星规模阵列 – 旨在捕捉黑洞的图像。在全球协调的新闻发布会上,EHT研究人员透露,他们成功地揭开了超大质量黑洞及其阴影的第一个直接视觉证据。

这部17分钟的电影探讨了导致这一历史形象的努力,从爱因斯坦和施瓦兹希尔德的科学到EHT合作的斗争和成功。

更多信息和下载选项:http://www.eso.org/public/videos/eso1907a/

对引力的修改理论,下图基本上囊括了主要的一些路线。

图片来源:http://www.cgc-yzu.cn/

While Einstein’s general relativity has been well tested by various observations, it is possible that at the cosmological scale it might require some modification or extension, which could, in turn, explain dark matter or dark energy. There exist a plethora of modified theories of gravity, from simple straightforward generalizations of the Hilbert-Einstein action (e.g. f(R) gravity), to utilizing other geometric structures (e.g. f(T) gravity that models gravity as spacetime torsion instead of curvature), it is important to constrain these theories from both observations and theoretical grounds (a good theory should be mathematically self-consistent and free of pathologies). [Figure source: Tessa Baker]