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来源:原创 编辑:admin 时间:2017-06-02 17:43


听写稿:

Well, I'm going to trying answer that question. But thebottom line is that I'm going to struggle. Because, en, quantum mechanics whilea fantastic theory makes incredibly accurate predictions,狮威娱乐CWEI88.com, it's much harder tointerpret when it comes to thinking about its real meaning. As greatestphysicists Richard Feynman once said, I feel confident in saying that no one inthe world understands quantum mechanics. I think that holds true today. But, tostart off with,狮威娱乐CWEI88.com, you know, why would the wave function be anything to do withthe real world? So the wave function comes about from solving something likeSchr?dinger's equation up here, where this is a differential equation that yousolve to get this wave function, in this case it's a function of position andtime. And depending on the situation, you might get some sort of solution likethis black line here. En, so this looks something like a wave from classicalmechanics. But so far, it's just the solution to a differential equation withno obvious connection to the real world. But it turns out that if you squarethis wave function getting something like this red line, then that is actuallyproportional to probability of measuring this particle to be in one of thesepositions at this time. So that's its connection to the real world. But is it areal physical thing? Well if you look at more complicated situation likeYoung's double slit experiment, it's the wave function that passes through the slits.And because the interference pattern on the other side is influenced by theslits, that's a possibility that is certainly indirect with the real world. Butto answer more definitively than that, I'm going to defer. I think to do thatwould require a deep understanding of reality, than I have andpossibly that anyone has.

翻译稿:

好吧,我会试着回答这个问题。不过最终我会很狼狈的。因为,嗯,量子力学是一套了不起的理论,它做出了极为精准的预测,但是,当我们去思考它的现实意义时,很难对它进行解释。正如著名物理学家理查德·费曼曾经说过:“我可以很有信心地说,世界上没有人理解量子力学。”我认为这种说法放在今天也是正确的。但是首先来说,为什么波函数会跟现实世界有关系?那么波函数来源于求解像这里的薛定谔方程这种东西。这里是一个微分方程,你解方程得到这个波函数。这里是一个关于位置和时间的函数。根据条件的不同,你可能会得到这种样子的解,像这里的黑线。嗯,那么这看起来像是经典力学里面的波。但是,到这儿为止,它还只是一个微分方程的解,与现实世界没有明显的关联。但是结果发现,如果你对这个波函数求平方,得到这条红线这样的东西,那么它实际上就与观测这个粒子此时在这其中某个位置出现的概率成正比。所以这就是它与现实世界的联系。但这真的是实实在在的东西吗?如果你来看更复杂一点儿情况,比如杨氏双缝试验,穿过双缝的正是这种波函数。由于双缝后面的干涉图样受到了双缝的影响,这种概率显然是与现实世界的间接联系,狮威娱乐CWEI88.com。但是要更确切地回答这个问题,我无能为力。我认为要想确切回答这个问题,需要对现实存在有更深刻的理解。我自己、甚至说任何人恐怕都达不到这种深度。

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