Phys. Rev. D 35, 1811–1814 (1987)Tachyonic compactificationReceived 21 April 1986; published in the issue dated 15 March 1987 The geometry generated by a tachyon of (mass)2=-m2, which crosses the Universe along the z axis, is analyzed. By the same token that a black hole is stationary and hot, the analogous tachyonic geometry is z independent and z periodic (Δz=8πm), respectively, inside the Cherenkov cylinder. Generalized to five dimensions, the tachyonic motion generates the Witten geometry, with the effective four-geometry being Lorentz but notably not Poincaré invariant. The generalized Kruskal analysis is explicitly performed. © 1987 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevD.35.1811
DOI:
10.1103/PhysRevD.35.1811
PACS:
11.10.Kk, 04.60.+n, 14.80.Pb
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