Recent content by gnegnegne

Thank you for your answers! I'll definitely check the universities you mentioned. The linked movie isn't available in my country, but I've read a lot about the research done on topological quantum computing at Delft and it's very interesting, TU Delft seems to be one of the leading players in...

I'm in a Physics BSc programme and I would like to delve into quantum computation and quantum information. There are two master's degree in Europe that I find interesting in particular: Quantum Engineering MSc at ETH Zurich and Applied Physics MSc at TU Delft (track in Quantum Devices and...

Sorry, I don't want to be arrogant, but I just don't understand what I'm missing. Suppose you have a dipole with a charge ##-q## at ##\mathbf{r}## and a charge ##q## at ##\mathbf{r}+\mathbf{d}##. In the region there is a potential ##V(\mathbf{r})## (generated by something else). The total...

It's a scalar product, of course the energy depends on the angle between the dipole and the electric field, but it is not necessary to have an uniform electric field. See here for example...

Thank you for the answer! The equation for the force is wrong, I forgot to edit the 3 at the exponent, it's a 4 (you get it when you derive the electric field). So \mathbf{F}=-\frac{3p^2}{32\pi\epsilon_0y^4}\mathbf{\hat{y}}. The other equations should be right. About the potential energy: I'm...

Homework Statement A dipole ##\textbf{p}=p\mathbf{\hat{z}}## (oriented along the z axis for example) is parallel to a conducting grounded plane (xz plane) and is placed at a distance ##d## from it. I have to find the interaction energy and the force between the dipole and the plane. Homework...

Using the condition that the the potential has to be continuous: V(x)= \begin{cases} (\frac{\rho_0 d}{4\epsilon_0}-A)x-d(\frac{\rho_0 d}{4 \epsilon_0} - A) \quad \text{for} \quad \frac{d}{2} \leq x \leq d \\ -\frac{\rho_0 x^2}{2 \epsilon_0}+Ax \quad \text{for} \quad 0 \leq x \leq \frac{d}{2}...

Hi everyone! I have to solve a problem using Poisson's equation. There are two parallel infinite conductor planes in vacuum. The distance between them is d and they are both kept at a potential V=0. Between them there is a uniform volume density charge \rho_0>0 infinite along the directions...

Thanks for both the answers! Yes, we used a spectrometer with a nonius to measure the angles. I understand your explanation, however my problem isn't the estimation of the instrument error, which of course it's pretty rough. The problem is what do I have to do once I have a statistical standard...

Hi, thank you very much! Well, the mean is 0 and the standard deviation of the mean is 0.5773... (devstd/sqrt(3)) . I would consider as the total uncertainty $$\sqrt{0.5773^2+0.5^2}=0.76376...$$ Therefore as my result I would report $$0.0 \pm 0.8$$. However I'm not sure whether the standard...

In a lab experiment we had to measure some angles. Every angle measure is the difference between two angular positions and the instrument we used had a resolution of 1', so the uncertainty due to the instrument is $$\sigma_{instr}=\sqrt2'=0.02357... deg$$. We measured the same angle a few times...

Hi, I'm an undergraduate student studying Physics in Europe. I'm thinking of applying for a Master in a UK university. I was considering Cambridge and Imperial at the moment. I've read that Cambridge offers two courses: a MAst (predominantly taught) and a MPhil (predominantly research); on the...