منابع مشابه
Accelerating Cosmologies from S-Branes
We point out that the recently proposed model of a flat 4-dimensional universe with accelerated expansion in string/M-theory is a special case of time-dependent solutions that the author found under the name of “S-branes.” We also show that similar accelerating models can be obtained from S-branes if the internal space is chosen to be hyperbolic or flat spaces. PACS numbers: 04.50.+h, 11.25.Yb,...
متن کاملAccelerating Branes and Brane Temperature
We define the local acceleration and jerk of a relativistic brane in an ambient spacetime, and construct from them a dimensionless parameter λ that must be small for an interpretation of brane acceleration as local Unruh temperature. As examples, we discuss (i) open rotating branes, for which λ > 1 (ii) closed spherical branes expanding in Minkowski spacetime, for which λ = 0 when the worldvolu...
متن کاملp–BRANES, D–BRANES AND M–BRANES
We consider solutions to the string effective action corresponding to p–Branes, D–Branes and M –Branes and discuss some of their properties.
متن کاملD-branes from M-branes
The 2-brane and 4-brane solutions of ten dimensional IIA supergravity have a dual interpretation as Dirichlet-branes, or 'D-branes', of type IIA superstring theory and as 'M-branes' of an S 1-compactified eleven dimensional supermembrane theory, or M-theory. This eleven-dimensional connection is used to determine the ten-dimensional Lorentz covariant worldvolume action for the Dirichlet super 2...
متن کاملCosmological Creation of D-branes and anti-D-branes
We argue that the early universe may be described by an initial state of space-filling branes and anti-branes. At high temperature this system is stable. At low temperature tachyons appear and lead to a phase transition, dynamics, and the creation of D-branes. These branes are cosmologically produced in a generic fashion by the Kibble mechanism. From an entropic point of view, the formation of ...
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ژورنال
عنوان ژورنال: Physics Letters B
سال: 1998
ISSN: 0370-2693
DOI: 10.1016/s0370-2693(98)00512-7