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Browsing Fen - Edebiyat Fakültesi by Author "Yılmaz, Nejat T."

Browsing Fen - Edebiyat Fakültesi by Author "Yılmaz, Nejat T."

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  • Algebraic integration of sigma-model field equations 
    Yılmaz, Nejat T. (Springer, 2009-05)
    We prove that the dualization algebra of the sigma model with a symmetric coset space is a Lie algebra and show that it generates an appropriate adjoint representation that allows integrating the field equations locally, ...
  • An implicit decoupling for the dilatons and the axions of the heterotic string 
    Yılmaz, Nejat T. (Elsevier Science, 2007-03-08)
    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 ...
  • Decoupling structure of the principal sigma model–Maxwell interactions 
    Yılmaz, Nejat T. (Academic Press Inc Elsevier Science, 2008-07)
    The principal sigma model and Abelian gauge fields coupling is studied. By expressing the first-order formulation of the gauge field equations an implicit on-shell scalar-gauge field decoupling structure is revealed. It ...
  • Dualisation of the D=9 matter coupled supergravity 
    Yılmaz, Nejat T. (Springer, 2005-06)
    We perform the bosonic dualisation of the matter coupled N = 1, D = 9 supergravity. We derive the Lie superalgebra which parameterizes the coset map whose Cartan form realizes the second-order bosonic field equations. ...
  • Dualisation of the symmetric space sigma model with couplings 
    Dereli, Tekin; Yılmaz, Nejat T. (Elsevier Science BV, 2005-01-17)
    The first-order formulation of the G/K symmetric space sigma model of the scalar cosets of the supergravity theories is discussed when there is coupling of (m - 1)-form matter fields. The Lie superalgebra which enables the ...
  • Dualization of the principal sigma model 
    Yılmaz, Nejat T. (Amer Inst Physics, 2008-01)
    The first-order formulation of the principal sigma model with a Lie group target space is performed. By using the dualization of the algebra and the field content of the theory the field equations which are solely written ...
  • Heterotic string dynamics in the solvable Lie algebra gauge 
    Yılmaz, Nejat T. (Elsevier Science, 2007-03-12)
    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 ...
  • Integrated field equations of heterotic supergravities 
    Yılmaz, Nejat T. (World Scientific, 2008-03-10)
    The first-order bosonic field equations of the D-dimensional effective low energy theory which describes the massless background coupling of the D-dimensional fully Higgsed heterotic string are derived
  • Nonlinear realization of the N=2, D=6 supergravity 
    Yılmaz, Nejat T. (World Scientific, 2007-01-10)
    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 ...
  • Nonlinear realization of the script N = 2, D = 6 supergravity 
    Yılmaz, Nejat T. (2007-01-10)
    We have applied the method of dualization to construct the coset realization of the bosonic sector of the script N = 2, D = 6 supergravity which is coupled to a tensor multiplet. The bosonic field equations are regained ...
  • On the symmetric space sigma-model kinematics 
    Yılmaz, Nejat T. (World Scientific Publ CO PTE LTD, 2007-06-20)
    The solvable Lie algebra parametrization of the symmetric spaces is discussed. Based on the solvable Lie algebra gauge two equivalent formulations of the symmetric space sigma model are studied. Their correspondence is ...
  • Symmetric space σ-model dynamics: Internal metric formalism 
    Yılmaz, Nejat T. (Elsevier Science, 2006-11-09)
    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 ...