5,154 research outputs found
Bosonic string - Kaluza Klein theory exact solutions using 5D-6D dualities
We present the explicit formulae which allow to transform the general
solution of the 6D Kaluza--Klein theory on a 3--torus into the special solution
of the 6D bosonic string theory on a 3--torus as well as into the general
solution of the 5D bosonic string theory on a 2--torus. We construct a new
family of the extremal solutions of the 3D chiral equation for the
SL(4,R)/SO(4) coset matrix and interpret it in terms of the component fields of
these three duality related theories.Comment: 13 pages in LaTe
String theory extensions of Einstein-Maxwell fields: the stationary case
We present a new approach for generating solutions in heterotic string theory
compactified down to three dimensions on a torus with d+n>2, where d and n
stand for the number of compactified space--time dimensions and Abelian gauge
fields, respectively. It is shown that in the case when d=2k+1 and n is
arbitrary, one can apply a solution--generating procedure starting from
solutions of the stationary Einstein theory with k Maxwell fields; our approach
leads to classes of solutions which are invariant with respect to the total
group of three-dimensional charging symmetries. We consider a particular
extension of the stationary Einstein--multi-Maxwell theory obtained on the
basis of the Kerr--multi-Newman--NUT special class of solutions and establish
the conditions under which the resulting multi--dimensional metric is free of
Dirac string peculiarities.Comment: 19 pages in late
Charging Interacting Rotating Black Holes in Heterotic String Theory
We present a formulation of the stationary bosonic string sector of the whole
toroidally compactified effective field theory of the heterotic string as a
double Ernst system which, in the framework of General Relativity describes, in
particular, a pair of interacting spinning black holes; however, in the
framework of low--energy string theory the double Ernst system can be
particularly interpreted as the rotating field configuration of two interacting
sources of black hole type coupled to dilaton and Kalb--Ramond fields. We
clarify the rotating character of the --component of the
antisymmetric tensor field of Kalb--Ramond and discuss on its possible torsion
nature. We also recall the fact that the double Ernst system possesses a
discrete symmetry which is used to relate physically different string vacua.
Therefore we apply the normalized Harrison transformation (a charging symmetry
which acts on the target space of the low--energy heterotic string theory
preserving the asymptotics of the transformed fields and endowing them with
multiple electromagnetic charges) on a generic solution of the double Ernst
system and compute the generated field configurations for the 4D effective
field theory of the heterotic string. This transformation generates the
vector field content of the whole low--energy heterotic string
spectrum and gives rise to a pair of interacting rotating black holes endowed
with dilaton, Kalb--Ramond and multiple electromagnetic fields where the charge
vectors are orthogonal to each other.Comment: 15 pages in latex, revised versio
Charging Symmetries and Linearizing Potentials for Einstein-Maxwell Dilaton-Axion Theory
We derive a set of complex potentials which linearize the action of charging
symmetries of the stationary Einstein-Maxwell dilaton-axion theory.Comment: 10 pages in LaTe
Towards the quantization of the non-relativistic D2-brane in the Pure Spinor Formalism
An attempt is made to apply the pure spinor formalism to the non-relativistic
IIA D2-brane. The fermionic constraints corresponding to the rescaled fermionic
coordinates are given. Two commuting spinor fields are introduced, each one
corresponding to a fermionic constraint. A BRST charge is constructed via the
ansatz proposed by N. Berkovits. The nilpotency of the BRST charge leads to a
set of constraints for the two spinor fields including pure spinor constraints.
A novel non-trivial solution is given for one of the spinor fields which can be
written as a sum of two pure spinors.Comment: 23 pages in latex, no figures; discussion added, some typos
corrected, more references adde
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