Recent content by Istvan Mezo

Let us suppose that there are two, spacelike separated electron in coordinate eigenstates. In the next moment, they begin to propagate as two spherical waves. (Better to say: the probability densities do propagate.) What happens when these waves overlap? There are two possibilities (as I...

If we have an electron source and a screen, we see that the electron hits the screen. This means that the wave function of the electron will be a Dirac-delta at a specified spacetime point. But before the detection, the probability density is nowhere zero. It seems that the reduction of the...

The collapse of the wave function is caused by an interaction with the rest of the Universe. This is not a linear process. On the other hand, in Quantum Field Theory the interactions between fields and particles are introduced in the Lagrange function as muiltiplication of operators. Maybe...

A possible unification of the two parts is the String theory. But how can this latter describe the "self-interaction"? In other words, a string is an one dimensional object and has positive mass. Then different parts of it may interact (for example) by gravity, mayn't it? Istvan

Dear Thealchemist83, I have just read your question, long after your exam... If this was your task, I wonder about the mark you've got because this sum does not have a closed form.:smile: See the fifth chapter of Concrete Mathematics (Graham, Knuth, Patashnik) Istvan