[Physicist]

That's all fine. The way I think about atoms is that, while indentical particles will mix their wavefunctions, you can in practice "mark" one of a pair of otherwise identical atoms by adding or subtracting a neutron or electron. (Easier to visualize than a spin state.) Throw the two of them into a box together and their wavefunctions almost won't mix. I say "almost" because there's a finite probability the spare neutron or electron can "tunnel" from one atom to the other.

[RightWingAtheist]

Continuing this off-topic discussion, I was wondering if I could ask a question which has been on my mind lately. It is my understanding that the wavelength of a particle is inversely related to its momentum, and that therefore, in an accelerator, where both the velocity and the mass of the particles are continualy increasing, the wave aspect of the particle becomes less noticeable. But is there any way in which the wave nature of matter has been or potentially can be exploited in HEP experiments?