Recent content by sxc656

Thanks:)

Thanks:)

Thanks to all:approve:

Hi, I get an a^4 whilst the answer has an a^2. Where am i going wrong? Is the delta function throwing a spanner in my work? see attachments for question/equations and my attempt. Thanks

Is this what you mean, i am not sure about the last two lines of working.

Hi, I cannot work out how the working shown in the attached pic is well, er worked out!:confused: Could someone explain the ins and outs of the complex analysis of taking the real or imaginary parts of some formula, for example in the context of the my case.

2/18. Thank You

Hi, see attachment for questions/equations and my attempt. I have had a go at this question but cannot get the correct answer, could someone be kind enough to point out my mistake and point me in the right direction. Cheers (sorry for poor pic quality)

Ah, the groundstate is minus lamda. Thanks (to all)

Do you mean the plus and minus modulus (\lambda) for the two eigenvalues? If so how does that give the minus sign? Thanks

Homework Statement Hi, i have put the question, my attempt and actual answer in the attached picture. My answer is not quite right; firstly why is the second term a minus lambda, and where does the O(lamdba^2) come from? Homework Equations The Attempt at a Solution

Ah, do they equal zero (the last terms) because i is from 0 to infinity and those two terms require i=-1?

Thanks for the replies. This is my working so far (see attachment). I have plugged V in but am stuck on the last 2 lines of my working. Using orthogonality i think you get lambda and lambda* for the 1st terms of the second-last and last-lines respectively but what about the second terms in those...

This was part of a hint for a question on time independent pertubation theory (see pic). i was reluctant to post the whole question because i wanted a good crack at it without help but i am now stuck. i can't seem to get the 2nd order term and can't work out what happens with the first order...

Quantum Mechanics algebra - time independent peturbation theory Hi Homework Statement The potential shown is operating on the eigenstate as shown in the pic. I am having trouble getting the second term using orthogonality (got the first term :-) ). Please Help! Homework Equations see...