Recent content by vidi

This is a question on the nitty-gritty bits of general relativity. Would anybody mind teaching me how to work these indices? **Definitions**: Throughout the following, repeated indices are to be summed over. Hodge dual of a p-form X: (*X)_{a_1...a_{n-p}}\equiv...

Thanks, Thaakisfox, I've got it now!

Homework Statement I am having trouble understanding how the following statement (taken from some old notes) is true: >For a 2 dimensional space such that ds^2=\frac{1}{u^2}(-du^2+dv^2) the timelike geodesics are given by u^2=v^2+av+b where a,b are constants. Homework Equations...

Thanks, Hypersphere.

Homework Statement Why is it that for a superconductor \alpha<0,\beta>0 in the Ginzburg-Landau model wit free energy formulation E=\int d^3x\,\, \frac{\vec B^2}{2\mu}+\frac{1}{2m}|(-i\hbar\nabla-e\vec A)\psi|^2+\alpha|\psi|^2+\beta|\psi|^4 Homework Equations E=\int d^3x\,\, \frac{\vec...

Homework Statement How does one solve the tensor differential equation for the relativistic motion of a partilcle of charge e and mass m, with 4-momentum p^a and electromagnetic field tensor F_{ab} of a constant magetic field \vec B perpendicular to the plane of motion...