Quantized Einstein-Rosen waves, AdS_2, and spontaneous symmetry breaking

Details Quantized Einstein-Rosen waves, AdS_2, and spontaneous symmetry breaking Quantized Einstein-Rosen waves, AdS_2, and spontaneous symmetry breaking

2000-07-28

arxiv.org/abs/hep-th/0007227v2

Phys.Lett. B498 (2001) 83-91

Physics

High Energy Physics

High Energy Physics - Theory

13 pages, Latex, 2 Figures. v2: Figure on AdS added, minor changes

Scientific paper

10.1016/S0370-2693(00)01379-4

4D cylindrical gravitational waves with aligned polarizations (Einstein-Rosen waves) are shown to be described by a weight 1/2 massive free field on the double cover of AdS_2. Thorn's C-energy is one of the sl(2,R) generators, the reconstruction from the (timelike) symmetry axis is the CFT_1 holography. Classically the phase space is also invariant under a O(1,1) group action on the metric coefficients that is a remnant of the original 4D diffeomorphism invariance. In the quantum theory this symmetry is found to be spontaneously broken while the AdS_2 conformal invariance remains intact.

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