Recent content by mvillagra

thanks for the links, I will check them out. The Zwiebach book looks great, although I can only read the table of contents from amazon, but its a good price.

I work in quantum computing, so my background on physics and mathematics is graduate-level of linear algebra, functional analysis, complex analysis and quantum theory, and undergraduate level of abstract algebra, geometry, and very basic topology. I don't know anything about quantum field theory...

I have a computer science background, so I don't know about this. Can somebody give me some recommendations on good introductory books about -String Theory - Wormholes -Black holes etc. I'm looking something for academics, not for general public. So maybe books for 1st year graduate...

I didn't write it down correctly, but the question is does solving |g(k)|'=0 and g'(k)=0 give the same critical points?

Hi, I have the following problem given a function f(k) defined on the reals and a complex constant z0, what is the maximum of the following function? z_0f(k) The maximum of the module is clearly the value k such that z_0f'(k)=0 right? because when you take the module, the squares...

I tried to decompose it but the integral stays ugly :frown: Also, I've checked the link, but the input was incorrect, there was one parenthesis missing and solved a different integral. I fixed it, and the answer I got was "Mathematica could not find a formula for your integral. Most likely...

If you want to understand why and what is happening, you should start from the definition of limits, not with the differentials. Apply the definition of limit to each derivation rule and you'll see it. A good reference to grasp these concepts the book on Calculus by Gilbert Strang is a good...

Maybe Laplaces's method could work. It requires an integral with the form: I_n=\int_a^b \phi(k)[f(x)]^tdk Take a maximum point \xi of the function f, then the integral is: I_n\sim \phi(\xi)[f(\xi)]^{t+1/2}\left[\frac{-2\pi}{tf{''}(\xi)}\right]^{1/2}\textrm{ as }t\to\infty I think...

Hi, can someone give me a hand with this "little" integral please. \int (\cos{k})^{t-s+1}(b-a\sin^2k)^{s/2}e^{-ik(n-1)}dk where t is the time, which is discrete s is between 0 and t k has domain [-pi, pi] n is a natural number a, b are complex constants actually this integral is...

aaah, I see now, crystal clear! As a computer scientist I'm not very use to these technical details in QM. Thank you very much guys for all your answers, now I can continue with this :-)

I understand these definitions, but its not clear why we have two different transformations, one for time and one for space. How do we know when to use one or the other? Is there any reference on this? I don't have the reference given in the paper in my library. I tried looking in Griffiths...

Hello, I have a question about the following problem: Given a wave equation \Psi(n,t) where t is the time, and n is an integer. What is the Fourier transform? I'm trying to reproduce this paper: One-dimensional Quantum Walks by Ambainis et al...

WoW I saw the video, so cool. I would love to see the fully mechanical lego turing machine

I'm starting to read chapter 4 right now, and until now for me it seems a really abstract introduction, which I appreciate but sometimes the explanations are hard to follow . It looks like a book that you will need to devote yourself reading it very carefully. As a computer sciences student I...

thank you very much for your answers, that was fast! I will certaintly take a look at these tips!