Recent content by khfrekek92

Alright thank you so much for pointing me in the right direction! I didn't know you couldn't calculate Wigner functions like that. I'll read up on that and give it a try. Thanks so much for your help!

Ah yes I see what you mean, I'll have to go back through and see what I missed. So now, with your $\rho$, do I just need to Trace over b to get the single-mode density operator for state a, and then plug that into the Winter integral as usual? Or do you need to do something different for...

I'm trying to calculate a Wigner Function of an entangled state, and I'm not quite sure how to proceed. I have created this state by sending in vacuum and a squeezed state into a 50/50 BS, where the output state has a density operator: $$\rho_{34}=S_{3}S_{4}S_{34}|00\rangle_{34}\langle...

I see exactly what you mean now! I think I understand how it all works now. Thank you so much for your help HenryK, I really appreciate it!

Hi HenryK! Thanks for your quick response! So in response to your second hint, I agree that the EMF is proportional to dB/dt. But doesn't dB/dt = d/dt(N1mu*I(t)/(2*R1))? This definitely depends on I, so how do I get a value for this? Thanks again for your help!

Homework Statement So I'm trying to figure out this problem: The base of our charging station is composed of a coil with N1 turns and area A1 connected to a 120 VAC, 60 Hz source. The device has a smaller coil with N2 turns and area A2, which when attached will fit completely inside the...

Homework Statement Hi everyone, My problem is fairly simple: We have a circular current loop enclosing area A, and with a constant current I. The loop is rotating about its diameter at a constant angular frequency \omega. All we need to do is find the electric dipole, and magnetic dipole...

Yes that is correct. However, because all 3 charges are on the z axis, the only non-zero component of the quadrupole moment tensor is Q_zz. Every other one goes to 0. Then, only one term will be in the potential summation, the Q_zz term. This term corresponds to nz*nz (which are two unit...

You can see it derived here: http://physicspages.com/2012/04/03/quadrupole-moment/ And sorry, epsilonor is just from my lack of latex understanding.. it is really supposed to be the vacuum constant times the magnitude of r: ε*|r|

Hi everyone! I'm currently working on this problem for which I am getting inconsistencies depending on how I do it. I'm trying to find the potential due to the quadrupole moment of the following distribution: +q at (0,0,d), -2q at (0,0,0), and +q at (0,0,-2d) I am doing this using two...

Ah man such a small algebra error! That makes everything work out perfectly, duh! Thank you so much!

Hi everyone! I am trying to create the density matrix for a spin-1/2 particle that is in thermal equilibrium at temperature T, and in a constant magnetic field oriented in the x-direction. This is a fairly straightforward process, but I'm getting stuck on one little part. Before starting I...

Homework Statement A satellite has a circular orbit 500 km above earth. A ball is thrown directly downwards radially at 20 m/s. Find the path of the ball relative to the satellite. Homework Equations mv^2/r=GMm/r^2 The Attempt at a Solution From the height of the orbit you can easily solve...

Hi all! I am applying to physics PhD programs across the U.S. and I'm not sure if my statement of purpose will cut it.. I am not the most creative writer and was wondering if anyone minded reading it to see what you think?? Any help would be greatly appreciated. Thank you! I am writing to...

I am currently applying to PhD physics programs across the US and so far my letters of recommendation are from the following: 2 astrophysics professors who I have taken astrophysics classes from, and 1 professor with a physics PhD but taught an upper division scientific writing class to me...