Recent content by leoneri

xepma, thank you very much with your explanation. give me time to digest these valuable information.

Hi, I am quite confused with few concepts and relations between quantum mechanics and statistical physics. Here it goes: 1. In quantum mechanics, we can calculate the energy levels of a bound state (confining potential). So in short, we calculate all possible energy level that a system...

Hi Omar, thanks for your reply. Your information from the Griffith's book is really helpful, and your explanation at least confirmed what I have in my mind, that \Delta x \Delta p_x \geq \frac{1}{2} \hbar is somehow related to ensemble concept. But I am still questioning about spread results...

Hi all, I have a confusion right now. To the truth is, I have been studying QM for some years, but somehow, some of its concepts are still not really clear for me. I understand that one of components of QM interpretation that generally accepted now is the Born postulate that...

Hi I am trying to make the following equation to get Boltzmann equation which I write below. f(\mathbf{x}+\frac{\mathbf{p}}{m}dt,\mathbf{p} + \mathbf{F}dt,t+dt) \,d\mathbf{x}\,d\mathbf{p} - f(\mathbf{x},\mathbf{p},t)d\mathbf{x}\,d\mathbf{p} = \left. \frac{\partial...

I can understand how you feel. Because I also experience the same, I just started my MS in nanophysics. :smile: I am not 31 yet (I will be 29 this year), but I can't help that I feel old compare to my friends in class. So, you are not the only one to feel it. However, my friend (he is a...

Hi, I am reading Introduction to Statistical Physics by Kerson Huang. On chapter 10 about Bose Gas, a statement intrigued me. He explains Photons. "Photons are the quanta of the Electromagnetic field. They are bosons whose number is not conserved, for they may be created and absorbed singly...

Thanks. I was sure about that, but one of my friend said I was wrong. So, is there a way to proof it? Because I see it as a definition that whenever there is a complex function w\left(z\right)=w\left(x+iy}\right), then the conjugate is always w\left(z^{*}\right)=w\left(x-iy\right). I would be...

Homework Statement I have a complex function w\left(z\right)=e^{sin\left(z\right)} What is the conjugate? 2. The attempt at a solution The conjugate is w\left(z^{*}\right)=e^{sin\left(z^{*}\right)} w\left(x-iy\right)=e^{sin\left(x-iy\right)} My question is, is my answer...

I see it now. Thanks a lot.

A complex function f\left(z\right)=\sqrt{z} can be splitted into two branches: 1. Principal branch: f_{1}\left(z\right)=\sqrt{r} e^{i \left(\theta/2\right)} 2. Second branch: f_{2}\left(z\right)=\sqrt{r} e^{i \left[\left(\theta+2\pi\right) /2\right]} My question is, is there a way to...

Hi thanks a lot. I've done the integral, and I also found a mistake that I made. The procedure you told me is right, but my first inception of the definition is wrong, it should be like this: \frac{1}{\left|\textbf{k}-\textbf{k}'\right|}=\frac{1}{k...

Thank you for your explanation. Now I understand what it means by 'carrier'. It is true that it depends on the context. The reason when I asked this is related to transistor. It was mention that 'electron is carrying current', some people say that electron is the carrier. So it all depends on...

My record is one week without shower. And a friend of mine proudly said that he didn't had a shower for 20 days.. (and yes, he has soap, towel, and access to bathroom) LOL.

Hi all, I am trying to learn Hartree-Fock theory on free electron gas. But I am stumbled on one integration that I cannot seem to figure out. Here is the integral: \int_{k'<k_{F}}\frac{d\textbf{k}'}{(2\pi)^3}\frac{4\pi e^2}{\left|\textbf{k}-\textbf{k}'\right|^2} I cannot figure out on...