Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2005-01-20
Phys.Rev.Lett. 94 (2005) 191602
Physics
High Energy Physics
High Energy Physics - Theory
4 pages
Scientific paper
10.1103/PhysRevLett.94.191602
We study a modification of electromagnetism which violates Lorentz invariance at large distances. In this theory, electromagnetic waves are massive, but the static force between charged particles is Coulomb not Yukawa. At very short distances the theory looks just like QED. But for distances larger than 1/m the massive dispersion relation of the waves can be appreciated, and the Coulomb force can be used to communicate faster than the speed of light. In fact, electrical signals are transmitted instantly, but take a time ~ 1/m to build up to full strength. After that, undamped oscillations of the electric field are set in and continue until they are dispersed by the arrival of the Lorentz-obeying part of the transmission. We study experimental constraints on such a theory and find that the Compton wavelength of the photon may be as small as 6000 km. This bound is weaker than for a Lorentz-invariant mass, essentially because in our case the Coulomb constraint is removed.
Dvali Gia
Papucci Michele
Schwartz Matthew D.
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