On the relation between Unruh and Sokolov--Ternov effects

Details On the relation between Unruh and Sokolov--Ternov effects On the relation between Unruh and Sokolov--Ternov effects

2006-10-29

arxiv.org/abs/hep-ph/0610391v4

Int.J.Mod.Phys.A22:4797-4823,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

23 pages, no figures

Scientific paper

10.1142/S0217751X07037081

We show that the Sokolov--Ternov effect -- the depolarization of particles in storage rings coming from synchrotron radiation due to spin flip transitions -- is physically equivalent to the Unruh effect for circular acceleration if one uses a spin 1/2 particle as the Unruh--DeWitt detector. It is shown that for the electron, with gyromagnetic number $g \approx 2$, the exponential contribution to the polarization, which usually characterizes the Unruh effect, is "hidden" in the standard Sokolov-Ternov effect making it hard to observe. Thus, our conclusions are different in detail from previous work.

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