Browsing by Author "Yilmaz, Nejat T."

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An implicit decoupling for the dilatons and the axions of the heterotic string
(Elsevier Science Bv, 2007) Yilmaz, Nejat T.
A set of consistency conditions is derived for the massless sector of the D-dimensional E-8 x E-8 heterotic string. Under the solvable Lie algebra gauge these conditions are further formulated explicitly in terms of the dilatons and the axions. It is then shown that these consistency conditions which are satisfied by the solution space give way to an implicit decoupling between the coset scalar sector namely the dilatons and the axions and the gauge fields of the theory. (c) 2007 Elsevier B.V. All rights reserved.
Heterotic string dynamics in the solvable Lie algebra gauge
(Elsevier, 2007) Yilmaz, Nejat T.
A revision of the toroidal Kaluza-Klein compactification of the massless sector of the E-8 x E-8 heterotic string, is given. Under the solvable Lie algebra gauge the dynamics of the O(p, q)/(O(p) x O(q)) symmetric space sigma model which is coupled to a dilaton. N Abelian gauge fields and the Chern-Simons type field strength is studied in a general formalism. The results are used to derive the bosonic matter field equations of the massless sector of the D-dimensional compactified E-8 x E-8 heterotic string. (c) 2006 Elsevier B.V. All rights reserved.
Nonlinear realization of the N=2, D=6 supergravity
(World Scientific Publ Co Pte Ltd, 2007) Yilmaz, Nejat T.
We have applied the method of dualization to construct the coset realization of the bosonic sector of the N = 2, D = 6 supergravity which is coupled to a tensor multiplet. The bosonic field equations are regained through the Cartan-Maurer equation which the Cartanformsatisfies.The first-orderformulationofthetheoryisalsoobtainedasa twisted self-duality condition within the nonlinear coset construction.
Symmetric space sigma-model dynamics: Current formalism
(World Scientific Publ Co Pte Ltd, 2007) Yilmaz, Nejat T.
After explicity constructing the symmetric space sigma model Lagrangian in terms of the coset scalars of the solvable Lie algebra gauge in the current formalism, we derive the field equations of the theory.
Symmetric space σ-model dynamics: Internal metric formalism
(Elsevier Science Bv, 2006) Yilmaz, Nejat T.; 28932
For the symmetric space sigma model in the internal metric formalism we explicitly construct the Lagrangian in terms of the axions and the dilatons of the solvable Lie algebra gauge and then we exactly derive the axion-dilaton field equations. (c) 2006 Published by Elsevier B.V.