I'm writing an essay on the description of nature QM affords us, and hence I want to discuss the different interpretations of it. (My questions are mainly conceptual rather than anything else, so I thought this would be better here than the homework help forum?)(adsbygoogle = window.adsbygoogle || []).push({});

First of all, a couple of points I'd like to check about the "standard" interpretation(s!)

-Does the fact that weobserveinterference in experiments mean that interpreting the wave function as describingour knowledgeof the system fails, as the wave function clearly has some ontological significance prior to measurement?

-Is it true to say that although we have equations (Klein-Gordon, Dirac) that govern the time evolution of a system in a way that is compatible with special relativity, the fact remains even in QFT that the collapse of a wavefunction is not Lorentz covariant?

Secondly, one on Bohmian Mechanics. I'm reading the undivided universe at the moment, and in it Bohm states that the quantum field he postulates does not lend energy to the particle, but provides active information that merely guides the particle. He then states the equation of motion

[tex]m\frac{dv}{dt}=-\nabla(V)-\nabla(Q)[/tex]

where Q is the quantum potential due to this field. He then states that this field satisfies Schroedinger's Eqn. So how does his Q term affect dp/dt without affecting the kinetic energy- which in non-relativistic QM is proportional to the square of the momentum? Is it to do with the way one inegrates the grad Q term wrt time? Or is it some funny complex vector with a zero modulus that essentially changes the direction of grad V?

Thanks in advance for your help.

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# Interpretations of QM- help on points!

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