Recent content by Alex Petrosyan

I second that you should under no circumstances limit yourself to Computation. I myself have done my masters on nested sampling (Python and very little fortran). For Condensed matter, I would suggest you look into DFT (there's a lot of mathematics that lends well to Computation), and some...

Intensity, as in energy per unit area per unit time can be increased in many ways: increasing the number of photons, and increasing the energy of each photon. The number of photons is straightforward; the energy of each - less so, it depends on the frequency of the light ##\omega = 2 \pi \nu##...

Don’t mean to be that guy, but usually you need to submit an attempted solution.

That, my friend, is why quantum mechanics was invented! You need to look at a very good textbook and photoelectric effect, they would find that the natural classical physics assumption, that is also assumed in your answer, is absolutely wrong. Experiments have shown that the electrons’...

I don’t want to give away the answer straight away, but the pressure over the bottom is uniform, and so is the pressure at the top. The pressure on everything else can be determined from the condition that ##p = ...## That being said, does it matter whether they’re talking about average or...

It's complicated... When I finished my undergrad, I was supposed to do national service back in my home country. I was accepted into a Masters' degree programme automatically, due to exam results, so I asked for if it were possible to take two years out. I didn't get drafted, but it was too...

Can you be a bit more specific about beyond the few I know of: It's more independent. It's a lot harder. Motivation is scarce. I know I'm asking for another snarky comment of the sort "you should have already figured it out by now", and I know that this question is getting asked a lot, but...

Hello everyone, I'm a Physics student on a gap year, doing a bit of work ATM. I'm going to come back in October this year to do a one-year Masters' at Cambridge, and I'm faced with a tough choice: A) Specialize in Astrophysics/cosmology, which is something that I'm not as good at, but really...

You already label the eigen values by their energy, which relies on that the eigenvalues are non-degenerate.

W bosons produce So called flavour changing currents, so no, electrons cannot directly emit or absorb W bosons. That being said, they can be created at weak vertices so a Z boson can decay to a pair of W’s Though because of the propagator it diminishes the amplitude of that interaction...

hi all! I’m trying to generalise the Caldeira-Leggett Hamiltonian (heat bath + particle) to the case of high velocities. Naturally, the multi-oscillator Hamiltonian needs to change and I have a gnawing suspicion that the multi-particle Hamiltonian is just the sum of single-particle hamiltonians...

I started coding with Pascal first. Nostalgia aside, it's not a very well-designed language. I really enjoyed C, where you had more fine control over memory allocation, and your strings could be of different lengths (and still be of type char*, unlike Pascal, where the length of the array was...

Out of personal experience, choosing the right language can have up to several percent speedup, if the language has a decent compiler and you know how to turn on all of its optimisations. Hell even Java which should run infinitely slower runs within 5% of some of the C++ that I've written. If...

There fixed it.

They are. The way I understand it, is as follows: 1) A Warp/Alcubierre drive is a bubble which isn't moving through ST, but Warping it. If something is on the path from A to B, it might get deformed. You should be fine, though. 2) A wormhole (ER-bridge) is like a tunnel from A to B. That is...