Recent content by Bertin

Below follows the passage of Rovelli and Vidotto's Covariant Loop Quantum Gravity that I do not understand. To give the context, let me clarify that a state ##\psi## is a function in ##L^2[\text{SU}(2)^L]##, defined over a graph with ##L## edges (called ''links'' in this context) dressed with...

By the symmetries of the metric, k = \partial_t and l = \partial_\phi are Killing vectors. Since they are Killing vectors, they satisfy k_\mu \dot{x}^\mu = E and l_\mu \dot{x}^\mu = L, for the same constants appearing in the expression we must prove, and where the dot means the derivative w.r.t...

And to reply to this, you got the point right. With all my courses still going on, I did not find the time to investigate the subject enough as to be able to go to a professor with a specific problem in mind.

Just as a general clarification, I am not arrogant or naive to the point of wanting to do quantum gravity without knowing anything about it. I have a strong curiosity towards it by the little things I read about it, and I would like to employ my mater thesis time to work on something related to...

Dear all, I open this thread hoping you can give me some advice on the situation that follows. I am ending my master degree in Physics, with a strong curiosity—and almost complete ignorance of—quantum gravity. It is relevant here to let you know that the reason I am attracted to this/these...

Ok, thank you very much. I'll look further into the references there, sorry for not having checked better!

Is this book "approach independent"? Why do you recommend it?

Hi, you all, I have been for a couple of semesters interested in quantum gravity as a problem, but truth is I never have been properly introduced to any of the candidate theories. Actually, there are multiple candidates and I would like to compare them. The question then is the following: do...

The most voted answer to this same question in stackexchange says that there is no generally accepted convetion and that, most often, the error in the numerical values expressed in yearsis greater than the differences in the numerical values introduced by using one or another usual definition of...

Halves-lives and average lifetimes, when studying nuclear decay, are often expressed in years even though years are not standarized, at least in SI (as far as I know). Borrowing the convention from astronomy and astrophysics, I usually take 1 \mathrm{yr} to be equal to 365.25 days of 86400...

Ok, I see this summer I'll be eating Morse and Feshbach's chapter 4 and 5 for breakfast, the book seems delicious (and infinite). I'm very happy you recommended it, I was pretty frustrated by Arfken, Weber and Harris (although I understand that any book that size would find similar limitations)...

Hi, you all, I open this thread to ask for any recommendation concerning integration as well as ODE/PDE solving techniques for physics. I love mathematics, and I usually read material on pure mathematics (most notably abstract algebra and a bit of topology) but here I'm more interested in the...