Recent content by CPL.Luke

I agree with Matheinste, The point I was trying to make is that if you pretend that the spaceship instantly accelerates in the opposite direction, then the problem is symmetrical and there is a paradox. however once you acknowledge that the spaceship must undergo acceleration, then you can...

Mentz you are assuming that it is minkowski space for the traveler, if that was the case then the equations you show would have both parties disagreeing on who was younger. The problem is solved from the travelers frame when you realize that the traveler passes through rindler space each time...

Mentz, I think this is the time where you have to demonstrate how the observer in the spaceship would go about calculating the proper time of the observer on the earth, from their reference frame. you are correct that the proper times will differ, however with just plane SR, you can't...

I think the issue here is that there is no basis for deciding who actually went on the trip and who did not. according to the observer on Earth the twin on the spaceship went on the trip, according to the observer on the spaceship the Earth went on a trip away from...

thankyou, I still don't see the difference between a rank (1,1) tensor such as wab and wba, I may have to do more reading.

what if I had written it gcadwba or dwbagca in general when the indices come down do they go to the front of the line? or is there a situation where they would go to the back of the line? and what about the covariant indices, if they are raised do they go to the front or back of the line at...

thankyou, my question is more about why the order matters and how to determine the proper order in general. If you look at the first expression, its an expression to lower an index, but when this ndex gets lowered which side would it be on?

if I have an expression gca * dwab is there any reason for the resultant tensor should be dwcb vs. dwbc?

I remember that being one ofthe methods that was used, I really am curious about the different methods. or what's necessary and sufficient condition effectively. For instance one professor of mine effectivley made it an axiom that the inner product of a x state vector and a p vector was equal...

I forgot the exact terminology for these types of operators but here goes. take for example the operators x, and p. the commuter equals i(h bar), and the eigenvectors are Fourier transforms of each other. my question is, how do you go about proving at least one of the properties listed...

I did it was an excellent paper, however it concluded on a sour note, with the time eigenstates not being physical. in reference two of that paper however the author demonstrates pauli's proof that time is not an operator, and then makes his way around the problem. I'm surprised that the paper...

actually the fed is currently printing money to pay debts of all sorts including the purchase of treasury bonds. This is a better way of doing what your thikning of as the government is spending the printed moey with the notion that they will eventually have to pay it back. however as the...

what potentials are you looking at?

I'm pretty sure that in general the only operator that could always be guarenteed to commute with any hamiltonian would be the hamiltonian itself or a constant, thus the only operators which have a constant mean value in time are the hamiltonian and some constant operator.

btw there is also a sin solution with an argument (in your notation) 2r(pi)x/a personally I prefer the notation n(pi)x/a n even however the cos solution you wrote is the one you want with r=1, that 2r+1 thing is just a way of writing n so that n is always odd. so just take the projection of...