Dear Members, I don't understand the last paragraph of Feynman's Lectures on Physics Vol III, P.3.4, in which he has refuted the "particle wave" conception of wave function,...

May 23, 2005 This Week's Finds in Mathematical Physics - Week 216 John Baez There are lots of different things called "zeta functions" in mathematics and physics. The...

Dear Members, which universities do you recommend me to apply for a good program in Foundational Physics, in US Canada and Europe? cheers, Ali

I'm looking at Wald's book on QFT in curved spacetime. In section 4.6 he talks about the definition of the stress-energy tensor. It is defined by a product of two field...

Dear Members, In Late Sakurai's " Modern Quantum Mechanics", in the description of Stern-Gerlach experiment, you read "Because the atom as a whole is very HEAVY, we expect...

Is there any connection between the need for infinite dimensional spaces in quantum mechanics and the Uncertainty Principle (UP)? In classical mechanics objects have a known...

Dear Members, why the square matrix representation of an observable operator A is diagonal? cheers, Ali

Dear Members, On p.18 of Sakurai's "Modern Quantum Mechanics" we read " ... by asserting that the whole ket space is spanned by the eigenkets of A, the eigenkets of A must...

Suppose we discretize a scalar field \phi on a finite lattice and quantize it. How do we set boundary conditions for the discrete field operators? Specifying \hat\phi_i = 0...

Dear Members, why in Stern-Gerlach experiment, one of the poles should have a very sharp edge? regards, Ali

i've been looking into the NIST site on their standard expression of the time: http://tf.nist.gov/pubs/bulletin/leapsecond.htm this brings me back several decades...

Dear Members, in explaining the inadequacy of classical mechanics for the sequential Stern-Gerlach experiments (p.4 of Sakurai's Modern Quantum Mechanics), a student may...

In the 2004-2005 academic year, the Quantum Gravity Seminar at UCR is about gauge theory and topology. Derek Wise is taking notes on my lectures. In week 8 of the Fall...

It is a mystery why math theories describe electrons. But why does math theories also apply so well to Wall Street? The second quantization formalism of QFTs is a...

Dear Friends, We now that's a problem when we work in Quantum Mechanics with Relativity. It's like a paradoxal situation that one works only if the influences of the other...

What is the right way to think about the expansion of the Universe if we take the old "inertial motion of mass" approach? The one that said the Big Bang created kinetic...

It is a mystery why math theories describe electrons. But why does math theories also apply so well to Wall Street? The second quantization formalism of QFTs is a...

I'm sorry, the correct link is: http://usuarios.lycos.es/Rufianin/aboutschrodingere.pdf ---------- Forwarded message ---------- From: Rafael Aparicio...

The Physics FAQ has a page on Olbers paradox at http://math.ucr.edu/home/baez/physics/Relativity/GR/olbers.html As far as it goes the FAQ is OK, but there is...

I have a question about holographic renormalization group flows I was hoping someone could help me with. Suppose I have some active bulk scalar. Near the boundary there...