Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
1994-07-04
Mod.Phys.Lett. A9 (1994) 3105-3118
Physics
High Energy Physics
High Energy Physics - Theory
16 pages, Latex file, TIFR/TH/94-24, IC/94/147 (preprint numbers are included)
Scientific paper
We study the dynamics of the boundary dilaton gravity coupled to N massles scalars. We rederive the boundary conditions of [1] and [3] in a way which makes the requirement of reparametrization invariance and role of conformal anomaly explicit. We then study the semiclassical behaviour of the boundary in the N = 24 theory in the presence of an incoming matter wave with a constant energy flux spreaded over a finite interval. There is a critical value of the matter energy density below which the boundary is stable and all the matter is reflected back. For energy densities greater than this critical value there is a similar behaviour for small values of total energy thrown in. However, when the total energy exceeds another critical value, the boundary exibits a runaway behaviour and the spacetime devolopes singularities and horizons.
Das Sumit R.
Mukherji Sudipta
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