Recent content by pisto

No offense, but I didn't reply because I thought that after many clarifications of my doubt, all the replies that I got weren't satisfactory, and failed to get my point. But, finally, I found in my reference book something that explains it, and here it is, so you can understand what I was...

Why? I'm missing something big here. Putting something in a box from a mathematical standpoint means setting the wave function to zero elsewhere, but not touching anything within and at the boundary of the box. This cannot happen with a plane wave, again, from a mathematical standpoint. This, at...

The_Duck, you're assuming that this bonduary value is 0, but the lecture I referenced does not impose the equality to 0. Also, the equation of a plane wave, nor it squared absolute value (which has the physical significance of probability density of finding the represented particle in the...

no, that's not my case. This treatment is almost equal to my reference book: http://qfizik.upm.edu.my/phy3601/lecture05.pdf page 5. You see that the condition is not ψ(x, y, z)=ψ(x+L, y, z)=ψ(x, y+L, z)=ψ(x, y, z+L)=0, but the value at the boundary can be non-zero. So there can't be an analogy...

Hi everybody. I'm beginning my first course on quantum physics, and our professor introduced the box normalization for plane waves. My question is: why do we need to impose conditions on the borders? I haven't been able to find any explanation on the internet, as every text I found just...