Sasaki Misao SASAKI Misao

Articles:  1-20 of 49

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  • Destabilizing Tachyonic Vacua at or above the BF Bound

    KANNO Sugumi , SASAKI Misao , SODA Jiro , Institute of Cosmology Department of Physics and Astronomy Tufts University , Yukawa Institute for Theoretical Physics Kyoto University , Department of Physics Kyoto University

    It is well known that tachyonic vacua in an asymptotically Anti-de Sitter (AdS) spacetime are classically stable if the mass squared is at or above the Breitenlohner and Freedman (BF) bound. We study …

    Progress of theoretical physics 128(1), 213-226, 2012-07-25

    DOI  References (24)

  • Kaluza-Klein Braneworld Cosmology with Static Internal Dimensions

    KANNO Sugumi , LANGLOIS David , SASAKI Misao , SODA Jiro , Department of Physics McGill University , APC Universite , Yukawa Institute for Theoretical Physics Kyoto University , Department of Physics Kyoto University

    We investigate the Kaluza-Klein braneworld cosmology from the point of view of observers on the brane. We first generalize the Shiromizu-Maeda-Sasaki (SMS) equations to higher dimensions. As an applic …

    Progress of Theoretical Physics 118(4), 701-713, 2007-10-25

    DOI  References (60)

  • A New Analytical Method for Self-Force Regularization. II : Testing the Efficiency for Circular Orbits

    HIKIDA Wataru , JHINGAN Sanjay , NAKANO Hiroyuki , SAGO Norichika , SASAKI Misao , TANAKA Takahiro , Yukawa Institute for Theoretical Physics Kyoto University:Department of Physics Graduate School of Science Kyoto University , Departamento de Fisica Teorica Universidad del Pais Vasco , Department of Mathematics and Physics Graduate School of Science Osaka City University , Department of Earth and Space Science Graduate School of Science Osaka University , Yukawa Institute for Theoretical Physics Kyoto University , Department of Physics Graduate School of Science Kyoto University

    In a previous paper, based on the black hole perturbation approach, we formulated a new analytical method for regularizing the self-force acting on a particle of small mass μ orbiting a Schwarzschild …

    Progress of Theoretical Physics 113(2), 283-303, 2005-02-25

    DOI  References (40)

  • Linearized Gravity on the de Sitter Brane in the Einstein Gauss-Bonnet Theory

    MINAMITSUJI Masato , SASAKI Misao , Department of Earth and Space Science Graduate School of Science Osaka University:Yukawa Institute for Theoretical Physics Kyoto University , Yukawa Institute for Theoretical Physics Kyoto University

    We investigate linearized gravity on a single de Sitter brane in the anti-de Sitter (AdS) bulk in the Einstein Gauss-Bonnet (EGB) theory. We find that Einstein gravity is recovered for a high energy b …

    Progress of Theoretical Physics 112(3), 451-473, 2004-09-25

    DOI  References (36) Cited by (1)

  • A New Analytical Method for Self-Force Regularization. I : Charged Scalar Particles in Schwarzschild Spacetime

    HIKIDA Wataru , JHINGAN Sanjay , NAKANO Hiroyuki , SAGO Norichika , SASAKI Misao , TANAKA Takahiro , Yukawa Institute for Theoretical Physics Kyoto University , Departamento de Fisica Teorica Universidad del Pais Vasco , Department of Mathematics and Physics Graduate School of Science Osaka City University , Department of Physics Graduate School of Science Kyoto University:Department of Earth and Space Science Graduate School of Science Osaka University , Yukawa Institute for Theoretical Physics Kyoto University , Department of Physics Graduate School of Science Kyoto University

    We formulate a new analytical method for regularizing the self-force acting on a particle of small mass μ orbiting a black hole of mass M, where μ ≪ M. At first order in μ, the geometry is perturbed a …

    Progress of Theoretical Physics 111(6), 821-840, 2004-06-25

    DOI  References (38)

  • An Improved Template Space for Gravitational Ringing of Black Holes

    NAKANO Hiroyuki , TAKAHASHI Hirotaka , TAGOSHI Hideyuki , SASAKI Misao , Department of Mathematics and Physics Osaka City University , Department of Physics Niigata University:Department of Earth and Space Science Osaka University:Yukawa Institute for Theoretical Physics Kyoto University , Department of Earth and Space Science Osaka University:Theoretical Astrophysics California Institute of Technology , Yukawa Institute for Theoretical Physics Kyoto University

    A black hole has characteristic quasi-normal modes that are excited when it is formed or when the geometry is perturbed. The state of a black hole when the quasi-normal modes are excited is called 'gr …

    Progress of Theoretical Physics 111(6), 781-805, 2004-06-25

    DOI  References (24)

  • Newton's Law on an Einstein "Gauss-Bonnet" Brane

    DERUELLE Nathalie , SASAKI Misao , Yukawa Institute for Theoretical Physics Kyoto University:Institut d'Astrophysique de Paris , Yukawa Institute for Theoretical Physics Kyoto University

    It is known that Newton's law of gravity holds asymptotically on a flat "brane" embedded in an anti-de Sitter "bulk"; this was shown not only when gravity in the bulk is described by Einstein's theory …

    Progress of Theoretical Physics 110(3), 441-456, 2003-09-25

    DOI  References (39)

  • Braneworld Inflation Driven by Dynamics of a Bulk scalar field

    HIMEMOTO Yoshiaki , SASAKI Misao

    We review a viable alternative scenario of the inflationary universe in the context of the Randall-Sundrum (RS) braneworld. In this scenario, the dynamics of a 5-dimensional scalar field, which we cal …

    Progress of Theoretical Physics (148), 235-244, 2003-03-28

    DOI  NDL Digital Collections  References (19)

  • Born-Again Braneworld

    KANNO Sugumi , SASAKI Misao , SODA Jiro , Graduate School of Human and Environmental Studies Kyoto University , Department of Earth and Space Science Graduate School of Science Osaka University , Department of Fundamental Sciences FIHS Kyoto University

    We propose a cosmological braneworld scenario in which two branes collide and emerge as reborn branes whose tensions have signs opposite to the original tensions of the respective branes. In this scen …

    Progress of Theoretical Physics 109(3), 357-369, 2003-03-25

    DOI  References (44) Cited by (1)

  • Covariant Self-Force Regularization of a Particle Orbiting a Schwarzschild Black Hole : Mode Decomposition Regularization

    MINO Yasushi , NAKANO Hiroyuki , SASAKI Misao , Department of Physics Washington University , Department of Earth and Space Science Graduate School of Science Osaka University , Department of Earth and Space Science Graduate School of Science Osaka University

    The covariant structure of the self-force of a particle in a general curved background has been elucidated in the cases of scalar, electromagnetic, and gravitational charges. Specifically, what we nee …

    Progress of Theoretical Physics 108(6), 1039-1064, 2002-12-25

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  • Quantum Radion on de Sitter Branes

    UCHIDA Gen , SASAKI Misao , Department of Earth and Space Science Graduate School of Science Osaka University:Yukawa Institute for Theoretical Physics Kyoto University , Department of Earth and Space Science Graduate School of Science Osaka University

    The quantum fluctuation of the relative location of two (<I>n</I>-1)-dimensional de Sitter branes (which have <I>n</I> spacetime dimensions) embedded in an (<I>n</I> …

    Progress of Theoretical Physics 108(3), 471-494, 2002-09-25

    J-STAGE  References (21)

  • Self-Force on a Scalar Charge in Circular Orbit around a Schwarzschild Black Hole

    NAKANO Hiroyuki , MINO Yasushi , SASAKI Misao , Theoretical Astrophysics California Institute of Technology Pasadena , Theoretical Astrophysics California Institute of Technology Pasadena , Department of Earth and Space Science Graduate School of Science Osaka University

    In an accompanying paper, we formulate two types of regularization methods to calculate the scalar self-force on a particle of charge q moving around a black hole of mass M [Y.Mino, H.Nakano and M.Sas …

    Progress of Theoretical Physics 106(2), 339-362, 2001-08-25

    DOI  References (36)

  • Radion on the de Sitter Brane

    GEN Uchida , SASAKI Misao , Department of Earth and Space Science Graduate School of Science Osaka University:Department of Physics School of Science University of Tokyo , Department of Physics School of Science University of Tokyo

    The radion on the de Sitter brane is investigated at the linear perturbation level, using the covariant curvature tensor formalism developed by Shiromizu, Maeda and Sasaki.<FONT SIZE="-1"><SU …

    Progress of Theoretical Physics 105(4), 591-606, 2001-04-25

    J-STAGE  References (31)

  • The Gravitational Reaction Force on a Particle in the Schwarzschild Background

    NAKANO Hiroyuki , SASAKI Misao , Department of Earth and Space Science Graduate School of Science Osaka University , Department of Earth and Space Science Graduate School of Science Osaka University

    We formulate a new method to calculate the gravitational reaction force on a particle of mass μ orbiting a massive black hole of mass M. In this formalism, the tail part of the retarded Green function …

    Progress of Theoretical Physics 105(2), 197-218, 2001-02-25

    DOI  References (31)

  • Anisotropies in Luminosity Distance

    SUGIURA Norimasa , SUGIYAMA Naoshi , SASAKI Misao , Department of Physics Kyoto University , Department of Physics Kyoto University , Department of Earth aud Space Science Oasaka University

    Anisotropies in the luminosity distance-redshift (<em>d</em><sub>L</sub> -<em>z</em>) relation caused by the large-scale structure (LSS) of the universe are studied …

    Progress of Theoretical Physics 101(4), 903-922, 1999-04-25

    J-STAGE  References (20)

  • Super-Horizon Scale Dynamics of Multi-Scalar Inflation

    SASAKI Misao , TANAKA Takahiro , Department of Earth and Space Science Graduate School of Science Osaka University , Department of Earth and Space Science Graduate School of Science Osaka University

    We consider the dynamics of a multi-component scalar field on super-horizon scales in the context of inflationary cosmology. We present a method to solve the perturbation equations on super-horizon sc …

    Progress of Theoretical Physics 99(5), 763-781, 1998-05-25

    J-STAGE  References (23)

  • Gravitational Radiation Reaction

    MINO Yasushi , SASAKI Misao , TANAKA Takahiro

    In this chapter, we consider the radiation reaction to the motion of a point-like particle of mass m and specific spin S traveling on a curved background. Assuming S=O(Gm) and Gm ≪ L where L is the le …

    Progress of theoretical physics 128, 373-406, 1997-12-26

    DOI  NDL Digital Collections  References (15) Cited by (4)

  • Black Hole Perturbation

    MINO Yasushi , SASAKI Misao , SHIBATA Masaru , TAGOSHI Hideyuki , TANAKA Takahiro

    In this chapter, we present analytic calculations of gravitational waves from a particle orbiting a black hole. We first review the Teukolsky formalism for dealing with the gravitational perturbation …

    Progress of theoretical physics 128, 1-121, 1997-12-26

    DOI  NDL Digital Collections  References (62)

  • The Spectrum of Gravitational Wave Perturbations in the One-Bubble Open Inflationary Universe

    TANAKA Takahiro , SASAKI Misao , Department of Earth and Space Science Osaka University , Department of Earth and Space Science Osaka University

    We give the initial spectrum of quantized gravitational waves in the context of the one-bubble open inflationary universe scenario. In determining the quantum state after the bubble nucleation, we ado …

    Progress of Theoretical Physics 97(2), 243-262, 1997-02-25

    J-STAGE  References (24)

  • Gravitational Waves by a Particle in Circular Orbits around a Schwarzschild Black Hole : 5.5 Post-Newtonian Formula

    TANAKA Takahiro , TAGOSHI Hideyuki , SASAKI Misao , Department of Earth and Space Science Osaka University , National Astronomical Observator , Department of Earth and Space Science Osaka University

    Using the post-Newtonian (PN) expansion technique of the gravitational wave perturbation around a Schwarzschild black hole, we calculate analytically the energy flux of gravitational waves induced by …

    Progress of Theoretical Physics 96(6), 1087-1101, 1996-12-25

    J-STAGE  References (15)

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