主题:【原创】关于粒子性和波动性 -- witten1
我找到了一个网页,兄台可以看看
http://www.physicsforums.com/showthread.php?t=215338
引用一部分相关内容
On 2008-02-13, Juan R. Gonzàlez-lvarez <[email protected]> wrote:
> I find different answers:
>
> ((Classical electrodynamics))
>
> v < c
>
> ((Relativistic Quantum Mechanics))
>
> v = c using Dirac equation for |PSI>.
Eh, no.
You are confused by an archaic paradox. The paradox consists of identifying the operator c*alpha (in the usual 3+1 Dirac equationnotation) with the physical velocity, which quite obviously doesn't work. For a modern discussion of the Dirac electron's velocity operator,see [1] where the author discusses the Foldy-Wouthuysen transformation and how to use it to get the correct operator obeservable. See also [2]for some more discussion and references.
The velocity operator thus obtained, satisfies the Heisenberg equationsof motion v = dx/dt and the well known relation v = p/m in the non-relativistic limit. Note, here x is not the spatial argument of the usual Dirac wave function. It is also obtained through the Foldy-Wouthuysen transformation, or from the formula given by Newton andWigner (again, see [2]). Once a particular time axis has been chosen,this operator x is unique (up to translations of the origin ofcoordinates).
这里的说法似乎有些不同,我就偷懒不去看,等你的评论了。
去搜这个是因为我觉得你的Dirac电子‘瞬时’速度为光速的‘解释’,不是很有物理意义撒。
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压缩 4 层
🙂一个简单的分析 3 witten1 字507 2009-08-03 11:30:07
🙂被电子光速推理小小的吓了一跳 2 秦之夏 字360 2009-08-13 18:46:03
🙂呵呵 3 witten1 字528 2009-08-13 19:53:44
🙂打断一下关于dirac电子为光速
🙂一起呵呵 1 秦之夏 字216 2009-08-13 22:43:08
🙂有空的话我会再讲量子Zeno定理 3 witten1 字1395 2009-08-14 14:24:04