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Classification of Hypercylindrical Spacetimes with Momentum Flow | | Hyeong-Chan Kim
; Gungwon Kang
; Jungjai Lee
; Youngone Lee
; | | Date: |
28 Sep 2010 | | Abstract: | We study the behavior of ADM mass, tension and momentum densities
characterizing asymptotically hypercylindrical metrics in five-dimensional
spacetime under boosts along the cylindrical axis. For such string-like metrics
two boost-invariant quantities are found, which are a sort of "string rest
mass-squared" and the sum of mass and tension densities. Analogous to the case
of a moving point particle, we show that the asymptotically hypercylindrical
geometries can be classified into three types depending on the value of the
"string rest mass-squared", namely, "ordinary string", "null string" and
"tachyon-like string" geometries. This asymptotic analysis shows that the
extraordinary metrics reported recently by some of the authors belong to the
"tachyon-like string". Consequently, it is likely that such extraordinary
solutions are the final states of tachyonic matter collapse. We also report two
new vacuum solutions which belong to the "null string" and the "tachyon-like
string", respectively. | | Source: | arXiv, 1009.5492 | | Services: | Forum | Review | PDF | Favorites | |
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