Recent content by d3nat

Wow! Thank you for all of the replies and suggestions. I've been away from the computer for a bit otherwise I would have responded to everyone sooner. I've just finished reading through everyone's thoughts (with a nice cup of tea!) All the suggestions and encouragement really brought a smile...

I thought about doing that, but I don't want to spend any more on my education.

I've struggled a lot in the past two years about whether or not I wanted to stay in Physics. Last year I graduated with my Bachelors and immediately started at a university to get my PhD. I didn't like the program for various reasons, so I took "an absence of leave" because I got a research...

Homework Statement Consider a particle confined in a cubical box with the sides of length L each. Obtain the general solution to the eigenvalues and the corresponding eigenfunctions. Compute the degeneracy of the first excited state. A perturbation is applied having the form H' = V from 0...

Homework Statement Solve for ##L^2_x## ##L_x = \frac{\hbar}{i} (-sin(\phi)\frac{d}{d\theta} - cos(\phi)cot(\theta)\frac{d}{d\phi}##** the d's should be partial derivatives, but I'm not sure how to do that symbol. Sorry! Homework Equations Solve for ##L^2_x## ##L_x = \frac{\hbar}{i}...

Ah, Okay ##dGdλ = AG+GB = G (A+B) = G (A + e^{A \lambda}Be^{-A \lambda})## Then just use the identity.

Homework Statement Prove: ## \frac{dG}{d\lambda} = G \Big( A +B + \frac{\lambda}{1!} [A,B] +\frac{\lambda^2}{2!} [A,[A,B]]... \Big)## Homework Equations ##G(\lambda) = e^{\lambda A}e^{\lambda B} ## The Attempt at a Solution I tried taking the derivative with respect to lambda: ##...

Ohhh. Well then, I feel dumb. My professor made them out to be completely different, so I thought it was two different methods of solving. Thanks!

I mean, yah, I can solve it with a Taylor series, but I wasn't sure how to solve using a Laurent series, which is what the problem asks.

Homework Statement Laurent series Homework Equations ##f(z) = sinh(z)## around origin The Attempt at a Solution ##sinh(z +\frac{1}{z}) = \sum_{-infty}^\infty A_nz^n## where ##A_n = \frac{1}{2\pi i} \oint \frac{sinh(z'+\frac{1}{z'})}{z'^{n+1}} d'## Let c = unit circle...

Homework Statement \psi (x) = Ne^{ \frac{-|x|}{a}+ \frac{ixp_o}{/hbar}} Compute Fourier transform defined by ##\phi (p) = \frac{1}{ \sqrt{2 \pi \hbar}} \int \psi (x) e^{ \frac{-ipx} {\hbar}} dx## to obtain ## \phi (x) ## Homework Equations Fourier transform = ##g(x)= \frac {1}{2 \pi} \int...

Anyone, please?

Hey guys, Has anyone done an internship at SLAC? If so, what was your experience? Please describe in detail. I applied for a one year internship there, and I'm really hoping to get it. I want some more "hands on/laboratory" work before graduate school. Currently, I have been accepted...

(Note: This is probably the wrong place for this, but I wasn't sure where to post this) What are some examples of when politics and physics research coincided or had strong direct impacts on each other? For example: Napoleon and Laplace/Poisson Catholic church and Galileo WW2 and the...

Thanks so much for your help!