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Suppose I have a complete set of two commuting observables $hat{A}, hat{B}$ for which: $$ hat{A} |{a} rangle = a |arangle $$ $$ hat{B} |b rangle =...
Asked on 11/15/2020 by Nunzio Damino
1 answerA magnetic dipole moment has the same magnetic field as if there were a current circulating in a loop in the same area. When doing problems involving magnetized materials, we...
Asked on 11/15/2020 by Nick Quirk
1 answerI think of a relativistic conformal field theory as basically any theory which does not have a length scale. Say all particles are massless and all couplings are dimensionless. (I...
Asked on 11/14/2020
1 answerFor Einstein's equation$$G_{mu nu} + Lambda g_{mu nu} = frac{8 pi G}{c^4} T_{mu nu}$$with $G_{mu nu} = R_{mu nu} - frac{1}{2} R , g_{mu...
Asked on 11/13/2020
1 answerI am trying to see that the contribution to the entanglement entropy (EE) of one Majorana fermion is $frac{1}{2}log2$. I’m working with the covariance matrix $Gamma$ of the...
Asked on 11/13/2020 by Geralt
0 answerAn intensity current I descends down the $z$-axis from $z = infty$ to $z = 0$, where it spreads out in an isotropic way on...
Asked on 11/13/2020 by Ben Ray
2 answerThere must be something really obvious that I am missing here but any help is appreciated. Suppose I have a theory with some action $S$ on some fields ...
Asked on 11/13/2020
1 answerI was thinking... We could calculate the power of a runner by using the equation $P = fv$, supposing his velocity constant. But so raise me a question: What...
Asked on 11/13/2020 by user277020
1 answerI had a asked a question about six months back what direction forces due to pressure must be pointing and I got a pretty good answer for it (here)....
Asked on 11/13/2020
0 answerI have read that hurricanes spin because of the Coriolis effect. Since the Coriolis force is a ficticious force, which is only present in a frame that is rotating w.r.t....
Asked on 11/13/2020 by Javi
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