Recent content by Laci

Unfortunately we cannot continue the dialogue, since I am leaving this desastrous forum after the insult of the Mentor.

If this is indeed the case, I cease to participate in this forum. I shall inquire about by the mentor. Is the statement of weirdoguy correct? If this is indeed the case, I cease to participate in this forum. My opinion about its todays level is desastrouos.

I am sorry, You are wrong. You should be more careful with mathematical formulations. " A hydrogen atom's states are not (or are not) plane waves." is not a meaningful statement. If a Hamiltonian is separable, then its eigenstates are products of the eigenfunctions of the separated degrees of...

I fully agree with this decision. Hopefully, young students still know the basics of Quantum Mechanics.

You repeat the standard argument related to Ehrenfest theorem, that for very large masses a narrow wave packet remains stable against astronomical times. I did not conradicted this at all. On the contrary I explicitely mentioned it. If it is very narrow it remains for all means narrow. My...

good by

I am sorry that You repeatedly misunderstand my statements. Elementary QM says, that in a translationary invariant system the motion of the c.m. is separable. This is true also in classical mechanics. Therefore, the total energy of the system consists of the sum of the two energies (c.m and...

If any object would be in rest its average c.m. kinetic energy would be infinite. This is the consequence of the Heisenberg uncertainty relation. It has nothing to do with its mass or with his internal structure (relative motion). The only stationary states of the c.m. motion of any object in...

As You know, the motion of the c.m. is separable and has no influence on the energy of the relative motion. It adds to it. The same is true about an atom. You will never find an atom in rest, because its c.m. energy would be infinite. The example with the gaussian is just an illustration...

This is very interesting, however still does not explain my main question about the center of mass states of macroscopic objects (why there are no smeared out states?) , nor does it clarify the ambigous relation between quantum and classical mechanics. One cannot formulate QM without using...

The average kinetic energy of the Gausssian package is inversely proportional to the quadrat of its width (see my note). Therefore it is lower for wider packets. Did I understood properly Your reference to my "work" ? Or You meant something else.

Now I must stop the chat, since here in central Europe it is night 2:23 am. Good night!

Because have lower average energy and nothing forbids them.

Not at all, but energetically are more favourable largely smeared center of masses, even plane waves. Who forbids them? By the way, if there would be no such a "rule" we could not do anything with the objects around us or with each other. Think about a glass of watter as a cloud spread in the...

PeterDonis referred to: "decoherence theory" I am afraid I misinterpreted this line of resarch. In now suppose, you spoke about the behaviour of subsystems of large mechanical systems. In my club it was quoted as theory of open systems. In the classical case it has to explain irreversibility...