I'm trying to derive the path integrals, but this step got me confused:
Consider the propagator
$$K_{q_{j+1},q_j}=\langle q_{j+1}|e^{-iH\delta t}|q_j\rangle $$
Knowing that ##\delta t## is small, we can expand it as
$$K_{q_{j+1},q_j}=\langle q_{j+1}|(1-iH\delta t-\frac 1 2 H² \delta...
I’m new in QM. I have a simple question: when one says that the wavefunction collapses, is it the same as saying that the variance of an observable is 0? Thanks.
My concern is an electron tube.
From what I understood so far, gas molecules will have an average velocity derived from the Maxwell distribution, and that velocity will influence in the electron collision frequency.
I can't see clearly though how the electron velocity itself in the presence...
Hello, I'm Porfirio from Rio de Janeiro, Brazil. I'm on my last semester of undergrad school. I just need to complete an internship and finish writing my monograph. Thinking about getting a Master degree in Astronomy or science teaching.