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我们能预知一切吗 – 译学馆
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我们能预知一切吗

Can we Predict Everything?

在日常生活中我们习惯于绝对确定的预测
In our everyday world, we’re used to absolute, deterministic predictions:
把球扔向空中 它会呈抛物线落下
throw a ball in the air, and it’ll fall along an ellipse;
把你的伞留在路中间
leave your umbrella parked on the street,
当你返回时 它依旧在那里 还是那把伞
and when you come back, it’s still there, just one umbrella.
量子物理却不像这样因为量子力学不允许我们
Quantum physics is not like this – because quantum mechanics doesn’t allow us to make
绝对地预测未来
absolute predictions about the future.
它只能预测出现不同结果的可能性并不能说
It only predicts the likelihoods of different outcomes to happen, and doesn’t say anything
哪个会确实发生
about which one will happen.
你可能会讲“好吧 这就像天气 气象员只会告诉你
“Well,” you might say, “that’s the same with the weather – the weatherman only tells you
下雨的概率是多少而不会告诉你到底会不会下”
what the chance of rain is; he can’t tell you whether or not it will rain.”
但可能气象员只是没有足够的知识关于
But maybe the weatherman just doesn’t have good enough knowledge of exactly where all
世界上的水分子和空气分子在哪 或者它们怎么互相影响
of the air and water molecules in the world are, nor a good enough model of how they interact
或者没有一个足够快的计算机来模拟它们的相互作用
or a fast enough computer to simulate all of their bajillion interactions.
原则上如果他有足够的数据和运转迅速的电脑 他的天气模型
Maybe in principle, if he had enough data and a fast enough computer, his weather model
就能精确地告诉你哪里会下雨
could tell you exactly where every raindrop would fall.
对么?
Right?
这个想法很合理 如果你有足够的数据你就能解释所有事
This reasonable idea, that if you just had more data you could explain everything, is
对宇宙有一个确定固定的观念
the classical, deterministic view of the universe.
很多物理学家包括爱因斯坦现在暂时认为这和
And for a while, many physicists, including Einstein, thought the same had to be true
量子力学是一样的 我们只是没有足够的信息把它放进我们
with quantum mechanics – maybe we just didn’t have enough information to put into our quantum
量子模型 也许还有许多经典的变化隐藏在我们的实验中
models; maybe there were classical variables that were hidden from us and our experiments,
输入就可以完美解决一切事 不需要量子力学
inputs that explained everything perfectly with no need for quantum mechanics and its
我的大脑可以完全确定地告诉你这只猫会死
“I’ll give you 50/50 odds on the cat being dead” mentality.
此外 事实证明我们能正确的测试出这种经典的 潜在的
Except, it turns out that we can actually test whether or not this sort of classical,
关于量子力学的解释是否存在 甚至是从理论上来说明
underlying explanation of quantum physics can exist even in principle.
这些细节是另一个视频的主题 但是这些实验告诉我们
The details are a topic for another video, but the experiments tell us… there is no
在量子力学中没有传统普遍基本的类型
classical, everyday, underlying description of quantum mechanics.
意思是爱因斯坦认为宇宙是量子力学不论你喜欢
And this means, Einstein, that the universe is quantum mechanical whether you like it
还是不喜欢这样认为
with a 50% chance, or not.
此外 我高兴的宣布一分钟物理节目有了主题T恤
ps, I’m excited to announce that MinutePhysics is now supported by MinutePhysics t-shirts.
购买请到dftba.com/minutephysics不要忘记变得更好哦
Get yours now at dftba.com/minutephysics and don’t forget to be awesome.

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视频概述

一分钟物理节目用浅显生动的漫画形式带你粗略了解量子物理的神奇世界

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收集自网络

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蘑菇菇

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视频来源

https://www.youtube.com/watch?v=dmX1W5umC1c

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