Browsing Department of Physics by Title

EMU I-REP

Browsing Department of Physics by Title

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  • A Class of Transcendent Solution to Ernst System 
    Halilsoy, Mustafa (Lettere Al Nuovo Cimento, Societa Italiana di Fisica, 1985)
    We present a method that generates a class of transcendent solutions to Ernst system in Einstein-Maxwell theory of general relativity.
  • Colliding EM Shock Waves in General Relativity 
    Halilsoy, Mustafa (Physical Review D, Amrican Physical Society (APS), 1988)
    we derive a new, exact solution for the Einstein-Maxwell equations that describes the collision (interaction) of two arbitrarily polarized electromagnetic shock waves. In the limit that the polarization angle vanishes, ...
  • Colliding EM Waves that Admit Separable Wave Equation 
    Halilsoy, Mustafa (General Relativity and Gravitation, Springer, 1994)
    We show that the massive wave equation is separable in two particular colliding Einstein-Maxwell waves space-times. The first is the type D metric of Chandrasekhar and Xanthopoulos whereas the second is the doubly ...
  • Colliding Impulsive Gravitational Waves 
    Yavuz, Nutku; Mustafa, Halilsoy (Physical Review Letters, American Physical Society (APS), 1977)
    We formulate the problem of colliding plane gravitational waves with two polarizations as the harmonic mappings of Riemannian manifolds and construct an exact solution of the vacuum Einstein field equations describing ...
  • Colliding Impulsive Waves in Succession 
    Mustafa, Halilsoy (Physical Review -Series d-, American Physical Society (APS), 1990)
    We formulate the initial-value problem for two colliding trains of impulsive gravitational waves. In the absence of a global, exact solution we show that in a region lying between the singularity u'+ U'= 1 and the wave ...
  • Colliding Plane Gravitational Waves 
    Halil, Mustafa (Halilsoy, Mustafa) (Physical Review D, American Physical Society (APS), 1979)
    New exact solutions of the vacuum Einstein field equations are constructed which describe the collision of plane gravitational waves. These solutions generalize those of Szekeres by relaxing the requirement of collinear ...
  • Colliding Superposed Waves in EM Theory 
    Halilsoy, Mustafa (Physical Review D, American Physical Society (APS), 1989)
    We reformulate the initial data on the characteristic surface for colliding waves in the Einstein- Maxwell theory. This approach takes into account the superposition principle for gravitational and electromagnetic waves. ...
  • Colliding wave solutions from five-dimensional black holes and black pp-branes 
    Halilsoy, Elif; Halilsoy, Mustafa; Ünver, Özlem (Journal of Mathematical Physics, American Institute of Physics (AIP), 2006)
    e consider both the five-dimensional Myers-Perry and Reissner-Nordstrom black holes (BHs) and black pp -branes in (4+p)(4+p) -dimensions. By employing the isometry with the colliding plane waves (CPWs) we generate ...
  • Colliding Wave Solutions in a Symmetric Non-metric Theory 
    Gürtuğ, Özay; Halilsoy, Mustafa (International Journal of Theoretical Physics, Springer, 2009)
    A method is given to generate the non-linear interaction (collision) of linearly polarized gravity coupled torsion waves in a non-metric theory. Explicit examples are given in which strong mutual focussing of gravitational ...
  • Collision of Electromagnetic Shock Waves Coupled with Axion Waves: An Example 
    Halilsoy, Mustafa; Sakallı, İzzet (Classical and Quantum Gravity, Institute of Physics (IOP) Publishing, 2003)
    We present an exact solution that describes collision of electromagnetic shock waves coupled with axion plane waves. The axion has a rather special coupling to the cross polarization term of the metric. The initial data ...
  • Comment On Colliding Plane Gravitational Waves 
    Mustafa, Halilsoy (Physics Letters, 1981)
    It is shown that a theorem proved on colliding plane gravitational waves is not correct.
  • Comment on 'Nonlinear dynamics of a position-dependent mass-driven Duffing-type oscillator' 
    Mustafa, Omar (IOP Publishing, 2013-09)
    Using a generalized coordinate along with a proper invertible coordinate transformation, we show that the Euler–Lagrange equation used by Bagchi et al (2013 J. Phys. A: Math. Theor. 46 032001) is in clear violation of ...
  • Comment on 'Position-dependent effective mass Dirac equations with PT-symmetric and non-PT-symmetric potentials 
    Mustafa, Omar; Mazharimousavi, Habib S. (IOP Publishing, 2007)
    Jia and Dutra (2006 J. Phys. A: Math. Gen. 39 11877) have considered the one-dimensional non-Hermitian complexified potentials with real spectra in the context of position-dependent mass in the Dirac equation. In their ...
  • Comment on "Static and spherically symmetric black holes in f(R) theories" 
    Mazharimousavi, S. Habib; Halilsoy, Mustafa (Physical Review D, American Physical Society (APS), 2012)
    We consider the interesting ‘‘near-horizon test’’ reported in S. E. P. Bergliaffa and Y. E. C. de O. Nunes,Phys. Rev. D 84, 084006 (2011) for any static, spherically symmetric black hole solution admitted in f(R)gravity. ...
  • Complexified von Roos Hamiltonian's η-weak-pseudo-Hermiticity, isospectrality and exact solvability 
    Mustafa, Omar; Mazharimousavi, Habib S. (IOP Publishing, 2008)
    A complexified von Roos Hamiltonian is considered and a Hermitian first-order intertwining differential operator is used to obtain the related position-dependent mass η-weak-pseudo-Hermitian Hamiltonians. Using a ...
  • Complexified von Roos Hamiltonian's η-weak-pseudo-Hermiticity, isospectrality and exact solvability 
    Mustafa, Omar; Mazharimousavi, Seyed Habib (IOP Science, 2008-06)
    A complexified von Roos Hamiltonian is considered and a Hermitian firstorder intertwining differential operator is used to obtain the related positiondependent mass η-weak-pseudo-HermitianHamiltonians. Using a Liouvilleantype ...
  • Compton Scattering 
    Övgün, Ali (University of Southampton, 2011)
  • Constant curvature f(R) gravity minimally coupled with Yang-Mills field 
    Mazharimousavi, S. Habib; Halilsoy, Mustafa; Tahamtan, Tayebeh (European Physical Journal C, Springer, 2011)
    We consider the particular class of f(R) gravities minimally coupled with Yang - Mills (YM) field in which the Ricci scalar =R_{0}= constant in all dimensions d\geq4. Even in this restricted class the spacetime has unlimited ...
  • Cosmic Strings Coupled With a Massless Scalar Field 
    Gürtuğ, Özay; Sakallı, İzzet (International Journal of Theoretical Physics, Springer, 2003)
    A scalar field generalization of Xanthopoulos's cylindrically symmetric solutions of the vacuum Einstein equation is obtained. The obtained solution preserves the properties of the Xanthopoulos solution, which are regular ...
  • Cosmology with Variable Physical Constants 
    Joseph, Gabriel Wirdzelii (Eastern Mediterranean University (EMU) - Doğu Akdeniz Üniversitesi (DAÜ), 2020)
    The speed of light is taken to be a constant in a vacuum. This forms the basic tool for the principle of General Covariance, which asserts that, all laws of Physics should take the same form in all frames of reference. ...