Recent content by physiker99

hey, I know how what Pauli matrices are, and I know [a, b], but I don't know {a, b}. I know Levi-Civita as well. I tried to do matrix multiplication [a,b]=a*b-b*a, but that did not lead me anywhere. As matrices, I wrote down arbitrary values such as a=[a1,a2],[a3,a4] and b=[b1,b2],[b3,b4]

I'm completely lost and need some advice on how to continue. I need to prove the 1st line on the link http://upload.wikimedia.org/math/0/f/8/0f873eaca989ffa1af9a323c6e62f3ed.png

thanks kreil. but how do you get a*e^kx and b*e^-kx?

what's the method to solve a diff. equation as follows: d^2(psi)/d(x^2) - (k^2)*(psi) = 0

Hey Quinzio, thanks for the reply, but I have figured it out. sin (n*pi) vanishes since n is always integer..

I couldn't figure out how (*) derived. How can the underlined part's sine function vanishes? http://img149.imageshack.us/img149/8642/asfdg.png Uploaded with ImageShack.us

I am not sure about how the integrations are initiated at the question below. http://img4.imageshack.us/img4/2831/123io.png Uploaded with ImageShack.us How does dA differ from dV and how are boundaries for integrations are done?

thanks for links, kevin. Graduate classses are way out of my league, but do you know if Susskind's lectures are just introductory or they cover QM topics in depth so that I can use them as a major source of study

Are there any? If so, which are the best ones? (Upper Division Undergrad)

This question is about normalizing a wave packet, this is actually the solution and I couldn't understand 2 points. - I cannot see how the red encircled part do not diverge to infinity. - And I cannot understand how the very last line is derived from the 2nd last one. For the second one...

i need to find normal directions for r^2=9 and x+y+z^2=1 at the point (2,-2,1)

How do I find "surface normal direction" for a plane on a point with coordinates specified?

Hello, I will be taking undergraduate level Quantum Mechanics this year. I do not want to face any problems due to required background on maths and physics. I took differential equations and Linear Algebra and I want to make some revisions before semester starts. Where do you think I should...

Hello, I have interest on a course and I would like your opinions. I don't have much of an electronics lab experience except for freshman physics labs. I just finished my sophomore year. I'd like to take an Intro to MEMS course, whose syllabus is as below: Fundamentals of...

Links are very helpful. Thanks a lot! (and sorry for the late reply.)