Recent content by acme37

Thanks, but I'm a bit confused. What else is the Green's Function if not the response to an ideal point source?

Hi all, I'd like to solve the following problem in 3 dimensions: \partial_t u(r,t) = D\Delta u(r,t) u(r,0) = 0 u(0,t) = C_o In words, I am looking at a point 'source' that is turned on at t=0 and held at constant temperature. The ultimate goal is to then convolve this solution with...

True. So, 1 - (7*6!)/8! = .875

This is problem 4 from section 2.3 of Fundamentals of Probability by Saeed Ghahramani. Homework Statement Robert has eight guests, two of whom are Jim and John. If the guests will arrive in a random order, what is the probability that John will not arrive right after Jim? Homework...

In case anybody is interested, here is why I was asking... For our QM final we had to pick a topic and do a writeup/presentation. I was intrigued by http://en.wikipedia.org/wiki/Electromagnetically_induced_transparency" and ended up writing generally about interference in three-level atomic...

I think I basically get it. "In general, we say that atomic coherence exists when the density matrix has off-diagonal elements" - Quantum Optics, Scully & Zubairy A coherence exists when an interference can occur

I'm having some trouble understanding the idea of coherence. Consider the phrase: "a coherent superposition of states." Here I understand the coherence to refer to the states being coupled to each other and capable of interfering, due to a perturbing field. How does this relate to...

I've used these http://farside.ph.utexas.edu/teaching/qmech/lectures/lectures.html" by Richard Fitzpatrick as a supplement to my text, I thought they were pretty good. Pretty much follows a standard treatment. Gerhard 't Hooft links to http://galileo.phys.virginia.edu/classes/252/home.html"...

Hi, Is it possible to search for a phrase, or specify that all terms must be found in a result? I've tried several different things but can't get it to work. Cheers

Well I was wrong then, bummer. A linear wave function in x was something I hadn't seen before so that was tricky. I think the non-normalizable argument works here, or you can solve it as a barrier that you then extend to infinity (like the wikipedia article does). It's weird to me that the...

Question: What happens when the energy of the state is exactly equal to the barrier it hits? Say the particle is traveling to the right and hits the barrier. Before hitting, you have your typical solutions, say Aexp(ikx) + Bexp(-ikx). After hitting, the V(psi) and E(psi) terms cancel...

I used https://www.amazon.com/dp/0072872527/?tag=pfamazon01-20 by Brown and Churchill last year in an upper level undergraduate complex analysis class. Highly recommended

Just a side question, as I am currently studying Mandarin here in China, with physics/math as my main concentration back in the States... Is there work out there translating journal articles between languages? Seems like some extra money to be made and and an interesting way to stay abreast...

My Nuclear Physics class this semester is using the textbook my professor wrote. It is out of print, and with good reason. Can anyone recommend a suitable undergraduate Nuclear Physics textbook which covers most of the basics at a reasonably advanced level? Looking at the usenet booklist Krane...

I love hyperphysics for concise overviews of lots of topics. Last semester I used notes from http://pupgg.princeton.edu/~groth/phy301f05/index.html at Princeton to supplement my study with Kittel and Kroemer. Hope these might help, there is plenty out there though.