Browsing Department of Physics by Title

EMU I-REP

Browsing Department of Physics by Title

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  • Stability of thin-shell wormholes supported by ordinary matter in Einstein-Maxwell-Gauss-Bonnet gravity 
    Mazharimousavi, S. Habib; Halilsoy, Mustafa; Amirabi, Zahra (Physical Review D, American Physical Society (APS), 2010)
    Recently in (Phys. Rev. D 76, 087502 (2007) and Phys. Rev. D 77, 089903(E) (2008)) a thin-shell wormhole has been introduced in 5-dimensional Einstein-Maxwell-Gauss-Bonnet (EMGB) gravity which was supported by normal matter. ...
  • Stable Magnetic Universes Revisited 
    Tahamtan, Tayebeh; Halilsoy, Mustafa (Astrophysics and Space Science, Springer, 2013)
    A regular class of static, cylindrically symmetric pure magnetic field metrics is rederived in a different metric ansatz in all dimensions. Radial, time dependent perturbations show that for dimensions d>3 such spacetimes ...
  • Stable thin-shell wormholes with a Chaplygin gas in Einstein-Maxwell-Gauss-Bonnet gravity 
    Amirabi, Zahra; Halilsoy, Mustafa; Mazharimousavi, S. Habib (Physical Review D, American Physical Society (APS), 2013)
    We study the stability of thin-shell wormholes in Einstein-Maxwell-Gauss-Bonnet gravity. The equation of state of the thin shell wormhole is considered first to obey a generalized Chaplygin gas and then we generalize it ...
  • Studies in Space-Times Admitting Two Space-Like Killing Vectors 
    Halilsoy, Mustafa (Journal of Mathematical Physics, American Institute of Physics (AIP), 1988)
    Some properties of the space-times admitting two spacelike Killing vectors are studied. In particular, using harmonic maps the degree of freedom on the M' manifold is exploited to add scalar and electromagnetic fields ...
  • Studies on Thin-shells and Thin-shell Wormholes 
    Övgün, Ali (Eastern Mediterranean University (EMU) - Doğu Akdeniz Üniversitesi (DAÜ), 2016-06)
    The study of traversable wormholes is very hot topic for the past 30 years. One of the best possible way to make traversable wormhole is using the thin-shells to cut and paste two spacetime which has tunnel from one ...
  • Supersymmetric Extension of Non-Hermitian su(2) Hamiltonian and Supercoherent States 
    Mustafa, Omar (SIGMA, 2010)
    A new class of non-Hermitian Hamiltonians with real spectrum, which are written as a real linear combination of su(2) generators in the form H=ωJ3+αJ−+βJ+, α≠β, is analyzed. The metrics which allows the transition to the ...
  • Test Field in sandwich Wave Space-Time 
    Halilsoy, Mustafa (Classical and Quantum Gravity, Institution of Physics (IOP) Publishing, 1997)
    Sandwich waves in the Einstein–Maxwell theory are expressed globally by introducing step functions at the boundaries. We show that a test particle crossing such a wave zone extracts energy from the sandwich wave.
  • Theorem to generate Einstein-Non Linear Maxwell Fields 
    Mazharimousavi, S. Habib; Gürtuğ, Özay; Halilsoy, Mustafa (Classical and Quantum Gravity, Institute of Physics (IOP) Publishing, 2010)
    We present a theorem in d-dimensional static, spherically symmetric spacetime in generic Lovelock gravity coupled with a non-linear electrodynamic source to generate solutions. The theorem states that irrespective of the ...
  • Thermomechanical properties of graphene and the graphene's impact on motion of light atoms by means of molecular dynamics 
    Lajevardipour, Alireza (Eastern Mediterranean University (EMU) - Doğu Akdeniz Üniversitesi (DAÜ), 2012-06)
  • Thin-shell wormholes from the regular Hayward black hole 
    Övgün, Ali (2016-01-07)
  • Thin-shell wormholes from the regular Hayward black hole 
    Halilsoy, Mustafa; Övgün, Ali; Mazharimousavi, S. Habib (The European Physical Journal C, Springer, 2014-03-13)
    We revisit the regular black hole found by Hayward in 4 -dimensional static, spherically symmetric spacetime. To find a possible source for such a spacetime we resort to the nonlinear electrodynamics in general relativity. ...
  • Thin-shell Wormholes in f(R)-Gravity 
    Kianfar, Khashayar (Eastern Mediterranean University (EMU) - Doğu Akdeniz Üniversitesi (DAÜ), 2019)
    We study the possibility of constructing \ thin-shell wormhole (TSW) in a particular 𝑓����(𝑅����)-gravity model coupled minimally with nonlinear electromagnetic fields. In doing so, first we give a new static spherically ...
  • Thin-shell wormholes supported by total normal matter 
    Mazharimousavi, S. Habib; Halilsoy, Mustafa (The European Physical Journal C, Springer, 2014)
    The Zipoy-Voorhees-Weyl (ZVW) spacetime characterized by mass (M) and oblateness (δ) is proposed in the construction of viable thin-shell wormholes (TSWs). Departure from spherical / cylindrical symmetry yields positive ...
  • A topological metric in 2+1-dimensions 
    Mazharimousavi, S. Habib; Halilsoy, Mustafa (European Physical Journal C, Springer, 2015)
    Real-valued triplet of scalar fields as source gives rise to a metric which tilts the scalar, not the light cone, in 2+1-dimensions. The topological metric is static, regular and it is characterized by an integer κ=±1,±2,.... ...
  • To what extent do engineering students master and retain an understanding of newtonian mechanics throughout their university life 
    Abdal Razzaq, Eman Hameed (Eastern Mediterranean University (EMU) - Doğu Akdeniz Üniversitesi (DAÜ), 2014-02)
    ABSTRACT: This research is to assess the conceptual understanding of towards learning Physics courses for master and undergraduate students among the first year and final year. The study examined engineering undergraduates ...
  • Tunneling of Massive Vector Particles From Rotating Charged Black Strings 
    Jusufi, Kimet; Övgün, Ali (Springer, 2016-06-02)
    We study the quantum tunneling of charged massive vector bosons from a charged static and a rotating black string. We apply the standard methods, first we use the WKB approximation and the Hamilton-Jacobi equation, and ...
  • Tunneling Times 
    Eser, Muhittin Cenk (Eastern Mediterranean University (EMU), 2011)
    ABSTRACT: The tunneling time problem was a very popular problem at the end of the 20th century.In Quantum Mechanics only observables can be measured, i.e. these observables are real quantities. From mathematics it is well ...
  • Tunnelling of vector particles from Lorentzian wormholes in 3+1 dimensions 
    Sakallı, İzzet; Övgün, Ali (THE EUROPEAN PHYSICAL JOURNAL PLUS, Springer, 2015-06-11)
    In this article, we consider the Hawking radiation (HR) of vector (massive spin-1) particles from the traversable Lorentzian wormholes (TLWH) in 3+1 dimensions. We start by providing the Proca equations for the TLWH. ...
  • Unified Bertotti-Robinson and Melvin Spacetimes 
    Halilsoy, Mustafa; Mazharimousavi, S. Habib (Physical Review D, American Physical Society (APS), 2013)
    We present a solution for the Einstein-Maxwell (EM) equations which unifies both the magnetic Bertotti-Robinson (BR) and Melvin (ML) solutions as a single metric in the axially symmetric coordinates t,ρ,z,φ. Depending on ...
  • Uninformed Hawking radiation 
    Sakallı, İzzet; Övgün, Ali (EPL, IOP Publishing (Institute of Physics), 2015-04-24)
    We show in detail that the Parikh-Wilczek tunneling method (PWTM), which was designed for resolving the information loss problem in Hawking radiation (HR) fails whenever the radiation occurs from an isothermal process. ...