时间的循环

Cycles of Time

Roger Penrose · 初版 2010 年

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“一本具有开创性的著作，为宇宙学中最深刻的三个问题提供了全新视角：在 Big Bang 之前究竟存在什么（如果真有的话）？我们宇宙中有序状态的来源是什么？宇宙的终极命运又将如何？目前对宇宙的理解认为，所有物质最终都将稀释至零密度，巨大的黑洞最终将蒸发为无质量的能量。我们这个时代最具创新精神的数学家之一 Roger Penrose 颠覆了宇宙‘热寂’这一主流认知，论证了我们这个加速膨胀的宇宙其预期的终极命运将如何

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sterlind · 2020 年
…我觉得物理学家们只是懒得费心，或者低估了那些虽不懂行却充满好奇心的外行人的智商。Roger Penrose 则是把科普做得很到位的另一个物理学家典范，比如在《Cycles of Time》里。
…I think the physicists just can't be bothered, and/or they underestimate the intelligence of uninformed but curious laypeople. Roger Penrose is another example of a physicist who does this right, in Cycles of Time for instance.
Santosh83 · 2018 年
也可以推荐 Penrose 的《Cycles of Time: An Extraordinary New View of the Universe》，能读到关于他自己的循环宇宙学（cyclic cosmology）观点的有趣阐述。https://en.wikipedia.org/wiki/Cycles_of_Time
Can also recommend Penrose's Cycles of Time: An Extraordinary New View of the Universe, for an interesting take on his own view of cyclic cosmology. https://en.wikipedia.org/wiki/Cycles_of_Time
nabla9 · 2019 年
Roger Penrose 的《Cycles of Time: An Extraordinary New View of the Universe》。听听 Sean Carroll 和 Roger Penrose 的那期播客，或者看文字记录，就能大致了解它的核心思想了。https://www.preposterousuniverse.com/podcast/2019/01/07/epis...…
Cycles of Time: An Extraordinary New View of the Universe by Roger Penrose. Listen the Sean Carrol's podcast with Roger Penrose, or read the transcript to get the general idea. https://www.preposterousuniverse.com/podcast/2019/01/07/epis...…
nabla9 · 2020 年
Roger Penrose 在《Cycles of Time》里对热寂（heat death）之后的时间提出了极其颠覆认知的观察和理论。在 10^100 年之后，当只剩下光子等无质量粒子、黑洞也已蒸发殆尽时，时间基本上就停止存在了。光子、胶子和引力子就这么存在着，不再有任何新的事件发生…
Roger Penrose has really mind-bending observation and theory about the time past heat death in the 'Cycles of Time'. After 10e100 years when there is only massless particles like photon's left and black holes have evaporated, time essentially stops existing. Photons, gluons and gravitons just go without any new events…
gfody · 2017 年
> 比起同行，忽悠 TED 的听众要容易得多。这似乎指出了纯理论研究面临的一个问题视角。比如为什么出版《Cycles of Time》，而不是发表在同行评审期刊（peer reviewed journal）上？Penrose 是在不真诚地博眼球，还是仅仅想分享一个连他自己都觉得有趣的想法，即使带有相当大的推测性质？EPFL 的结果挺有意思的…
> It's easier to impress a TED audience than your peers. this seems like a perspective on a problem with pure theoretical research. like why print "Cycles of Time" instead of publishing in a peer reviewed journal? is Penrose being disingenuous or is he just trying to share an idea he finds interesting even if reasonably speculative? the EPFL result is interesting…
sgt101 · 2018 年
我曾试着理解 Roger Penrose 在他《Cycles of Time》一书中对此的论证。我承认我啃得非常费劲！但其核心想法似乎是，与漫长的永恒相比，宇宙的初始状态非常奇特，本质上就是“1 对虚无”——然后是分化…
I tried to understand Roger Penrose's arguments about this in his book "Cycles of Time". I admit that I really struggled! But the idea seems to be that the initial state of the universe is very unusual compared with the rest of eternity and is essentially 1 vs nothing - and then differentiation…

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