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Browsing PHY – Journal Articles: Publisher & Author Versions (Post-Print Author Versions) – Physics by Title

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  • 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 ...
  • 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 ...
  • Counterrotational effects on stability of 2+1-dimensional thin-shell wormholes 
    Mazharimousavi, S. Habib; Halilsoy, Mustafa (The European Physical Journal C, Springer, 2014)
    The role of angular momentum in a 2+1-dimensional rotating thin-shell wormhole (TSW) is considered. Particular emphasis is made on stability when the shells (rings) are counterrotating. We find that counter-rotating halves ...
  • Cross-Polarized Cylindrical Gravitational Waves of Einstein and Rosen 
    Halilsoy, Mustafa (Nuovo Cimento B, Springer, 1988)
    Using Einstein-Rosen's linearly polarized waves as the seed solution, we derive an interesting solution for the Einstein's equations that describes the evolution of such waves with the second polarization.
  • d-dimensional generalization of the point canonical transformation for a quantum particle with position-dependent mass 
    Mustafa, Omar; Mazharimousavi, Seyed Habib (IOP Science, 2006-08-02)
    The d-dimensional generalization of the point canonical transformation for a quantum particle endowed with a position-dependent mass in the Schr¨odinger equation is described. Illustrative examples including the harmonic ...
  • d-dimensional non-asymptotically flat thin-shell wormholes in Einstein-Yang-Mills-Dilaton gravity 
    Mazharimousavi, S. Habib; Halilsoy, Mustafa; Amirabi, Zahra (Physics Letters A, Elsevier, 2011)
    Thin-shell wormholes in Einstein-Yang-Mills-dilaton (EYMD) gravity are considered. We show that a non-asymptotically flat (NAF) black hole solution of the d-dimensional EYMD theory provides stable thin-shell wormholes which ...
  • Dilatonic Entropic Force 
    Sakallı, İzzet (International Journal of Theoretical Physics, Springer, 2011)
    We show in detail that the entropic force of the static spherically symmetric spacetimes with unusual asymptotics can be calculated through the Verlinde's arguments. We introduce three different holographic screen candidates, ...
  • Dilatonic interpolation between Reissner-Nordstrom and Bertotti-Robinson spacetimes with physical consequences 
    Mazharimousavi, S. Habib; Halilsoy, Mustafa; Sakallı, İzzet; Gürtuğ, Özay (Classical and Quantum Gravity, Institute of Physics (IOP) Publishing, 2010)
    We give a general class of static, spherically symmetric, non-asymptotically flat and asymptotically non-(anti) de Sitter black hole solutions in Einstein-Maxwell-Dilaton (EMD) theory of gravity in 4-dimensions. In this ...
  • Dirac and Klein–Gordon particles in complex Coulombic fields: a similarity transformation 
    Mustafa, Omar (IOP Publishing, 2003)
    The observation that the existence of the amazing reality and discreteness of the spectrum need not necessarily be attributed to the Hermiticity of the Hamiltonian is re-emphasized in the context of the non-Hermitian Dirac ...
  • Distinct Family of Colliding Waves in General Relativity 
    Halilsoy, Mustafa (Physical Review D, American Physical Society (APS), 1988)
    We present a new family of exact solutions for the Einstein equations that describes colliding gravitational shock waves with cross polarization. In the limit of single polarization it reduces to a family that, up to a ...
  • Domain-Walls in Einstein-Gauss-Bonnet Bulk 
    Mazharimousavi, S. Habib; Halilsoy, Mustafa (Physical Review D, American Physical Society (APS), 2010)
    We investigate the dynamics of a d-dimensional domain wall (DW) in a d+1-dimensional Einstein-Gauss-Bonnet (EGB) bulk. Exact effective potential induced by the Gauss-Bonnet (GB) term on the wall is derived. In the absence ...
  • Double-bounce domain-wall in Einstein-Yang-Mills-Scalar black holes 
    Mazharimousavi, S. Habib; Halilsoy, Mustafa; Tahamtan, Tayabeh (European Physical Journal C, Springer, 2013)
    We find Einstein-Yang-Mills (EYM) black hole solutions endowed with massless scalar hair in the presence of a potential V(ϕ) as function of the scalar field ϕ. Choosing V(ϕ)=constant (or zero) sets the scalar field to ...