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ngkamsengpeter
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Given a particular system, how would one construct the stress-energy tensor? I was reading Mallett's paper and the stress-energy given for an infinitely long circulating cylinder of light is of the form [itex]T_{\mu\nu}=\epsilon \eta_\mu \eta_\nu[/itex] where [itex]\eta_\mu=(\eta_0,0,\eta_2,0)[/itex] and ε is the energy density of laser light with [itex]x^\mu=(t,\rho,\phi,z)[/itex]. Since the laser beam move in helical path, I would think that there is an energy flux in z direction, so T_03 should not be zero but it is zero given by Mallett. Can anyone explain to me how he come out with that stress-energy tensor?
Thanks.
Thanks.