However, Penrose and others made a shocking suggestion: perhaps you already have a quantum computer - in your head! They suggest that our brains (or at least parts of them) are quantum computers, and that this is a key to understanding consciousness.
Since decoherence spoils quantum effects, I decided to use the decoherence formulas that I'd been scooped on to check whether Penrose's idea really worked. I first did the maths for neurons...
...
When I plugged in the numbers, the answer I got was "not very long at all", or to be more specific, about 10^-20 (then billionths of a trillionth) of a second...
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I also did the maths for another model that Penrose had proposed, where the quantum computation was done not by neurons but by microtubules, parts of the scaffolding in cells, and ... (查看原文)
I've switched from collecting stamps to collecting cool questions whose answer is 42. Here are my favourites so far:
1. At what latitude was the book written?
2. What's the radius of the rainbow, in degrees?
3. At most how many percent of the gas around it can a black hole gobble up?
Feeding a black hole turns out to be a lot like feeding a baby: most of the material comes flying back at great speeds... Black holes can eat at most 1-1/√3 ≈ 42% of the gas around them. (查看原文)
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3 有用 魏知超 2018-09-22 21:44:01
三观震颤！
6 有用 伊靠谱 2017-07-23 20:41:00
差不多可以是最后一本在物理学上的科普努力了，不是说作者的水平如何，而是这种外行隔靴搔痒的了解，这本书应该已经达到了最高的高度吧。到此为止了，能理解的就是能理解的，不能理解的再努力也无法理解
0 有用 瞬·间 2017-08-25 13:20:58
只能读懂一部分，但获益匪浅。对宇宙的样子、意识的本质、生命的意义和人类的未来等都给予了详尽的说明与假设。
1 有用 安猪 2017-11-12 07:29:35
没看懂……
4 有用 世界尽头走地鸡 2018-09-24 13:23:30
英文版看了一半，偶尔翻翻中文，突然觉得中文这版翻译是按译者喜好翻的？不重要的语句就略过不翻...这样不太好吧？
0 有用 wowo 2024-05-17 00:41:50 河北
涉及物理数学的地方读不太懂
0 有用 江湖月报 2024-05-16 05:51:11 挪威
这本书于我非常有启发，回答了一些我一直很困惑的问题。但是后半部分难度过高，每次在下班路上读感觉又上了一次班。
0 有用 许泽Sylvia 2024-05-13 22:04:04 黑龙江
近半年读的最慢的书了，只能说最多看懂了三分之一。前面都能接受，包括作者比较激进的猜想，即便不认同，也能理解，但最后结语倒是不太喜欢了。
0 有用 没有事情好消遣 2024-05-07 23:51:54 江西
前面挺精彩的，勉强看了，后大半部分是听书听完的，感谢作者，很助眠，一听就睡，有点离不开了。下一本听霍金沉思录，无边的宇宙让我能很安心睡个好觉，我们现在所活着的都是屁。
0 有用 我不是江湖骗子 2024-05-03 17:50:30 北京
是否存在另一个你，也在读这本书呢？当你决定继续读下去时，他却没有读完这句话就放弃了？ 交给你了，平行宇宙的我。