Hosoya Akio Akio HOSOYA

Articles:  1-20 of 26

  • 1 / 2
  • Quantum Versions of Classical Randomized Algorithms

    CARLIN Alberto , HOSOYA Akio

    We present a quantum version of the classical probabilistic algorithms a'la Rabin for the test of primality of a given integer. Our quantum algorithm is based on the use of Grover's unitary operator f …

    Progress of Theoretical Physics 138, 495-500, 2000-04-28

    DOI  NDL Digital Collections  References (24)

  • Black Hole Radiation inside Apparent Horizon in Quantum Gravity

    HOSOYA Akio , ODA Ichiro , Department of Physics Tokyo Institute of Technology , Edogawa University

    We study black hole radiation inside the apparent horizon in quantum gravity. First we perform a canonical quantization for a spherically symmetric geometry, where one of the spatial coordinates is tr …

    Progress of Theoretical Physics 97(2), 233-241, 1997-02-25

    J-STAGE  References (17)

  • Quantum Computer

    HOSOYA Akio

    In this talk I will give an introductory overview of the recent development of quantum computation which includes the factoring and the fault-tolerant error correctin.

    Soryushiron Kenkyu Electronics 94(4), D90-D98, 1997

    J-STAGE 

  • Density Fluctuation in Extended Inflationary Universe

    Shin-ichi NAKAMURA , Akio HOSOYA , Department of Applied Physics Faculty of Science Tokyo Institute of Technology , Department of Physics Faculty of Science Tokyo Institute of Technology

    We evaluate the density perturbation which arises from quantum fluctuation in the extended inflation model from the first principle, i.e., quantum field theory in curved space-time and the gauge invar …

    Progress of Theoretical Physics 87(2), p401-407, 1992-02

    DOI 

  • Topology Change by Quantum Tunneling in(2+1)-Dimensional Einstein Gravity

    Yoshihisa FUJIWARA , Saburo HIGUCHI , Akio HOSOYA , Takashi MISHIMA , Masaru SHIINO , Department of Physics Tokyo Institute of Technology , Department of Physics Tokyo Institute of Technology , Department of Physics Tokyo Institute of Technology , Department of Physics Tokyo Institute of Technology , Department of Physics Tokyo Institute of Technology

    We investigate possibilities of topology change and nucleation of universes in the (2+1)-dimensional Einstein gravity model with negative cosmological constant. We demonstrate that topology change and …

    Progress of Theoretical Physics 87(2), p253-268, 1992-02

    DOI 

  • Dynamics of False-Vacuum Bubbles in (2+1)-Dimensional Gravity

    Hiromi SUZUKI , Yoshihisa FUJIWARA , Takashi MISHIMA , Akio HOSOYA , The College of Arts and Sciences Tokyo Woman's Christian University , Department of Physics Tokyo Institute of Technology , Department of Physics Tokyo Institute of Technology , Department of Physics Tokyo Institute of Technology

    Dynamics of false-vacuum bubbles is analytically solved in (2+1)-dimensional space-time. The bubbles in our toy model are actually circular strings which separate the locally conical and the de Sitter …

    Progress of Theoretical Physics 86(2), p411-418, 1991-08

    DOI 

  • (2+1)-Dimensional Classical Gravity with Point Sources in Maximal Slice

    Yoshihisa FUJIWARA , Akio HOSOYA , Takashi MISHIMA , Department of Physics Tokyo Institute of Technology , Department of Physics Tokyo Institute of Technology , Department of Physics Tokyo Institute of Technology

    We study the (2 + l)-dimensional classical gravity in the case of point sources of arbitrary motion using the maximal time slice and the conformal gauge for the spatial metric. The single moving parti …

    Progress of Theoretical Physics 85(6), p1363-1370, 1991-06

    DOI 

  • (2+1)-Dimensional Quantum Gravity--Case of Torus Universe

    Akio HOSOYA , Ken-ichi NAKAO , Department of Physics Tokyo Institute of Technology , KEK National Laboratory for High Energy Physics

    The (2+1)-dimensional pure Einstein gravity is studied in the canonical ADM formalism, assuming that the spatial surface is closed and compact. In the torus case for the spatial manifold we can do an …

    Progress of Theoretical Physics 84(4), p739-748, 1990-10

    DOI 

  • Conformal Factor in Canonical Quantum Gravity

    HOSOYA AKIO

    Adopting York's gauge, we formulate quantum geometrodynamics so that it contains only a single time-like variable corresponding to the total volume of the universe. In this gauge, the conformal f …

    Soryushiron Kenkyu Electronics 81(6), F85-F95, 1990

    J-STAGE 

  • A Diagrammatic Derivation of Coleman′s Vanishing Cosmological Constant

    Akio HOSOYA , Research Institute for Theoretical Physics Hiroshima University

    We present an alternative derivation of Coleman's expression for cosmological constant by summing over topologies of space-time in the wormhole dominance approximation. It is pointed out that the corr …

    Progress of Theoretical Physics 81(6), p1248-1253, 1989-06

    DOI 

  • Is Anisotropic Kaluza-Klein Model of Universe Chaotic?

    Toyoaki FURUSAWA , Akio HOSOYA , Department of Physics Osaka University , Department of Physics Osaka University

    We investigate the dynamical evolution of a 7-dimensional Kaluza-Klein space-time which oscillates anisotropical1y. Our model has the spatial manifold of a direct product of a flat three space and a g …

    Progress of Theoretical Physics 73(2), p467-475, 1985-02

    DOI 

  • Stochastic Quantization and Gribov Problem in Non-Abelian Gauge Theories

    HORIBE M. , Akio HOSOYA , Jiro SAKAMOTO , Department of Education Fukui University , Department of Physics Osaka University , Department of Physics Shimane University

    The Gribov problem of gauge fixing in non-abelian gauge theories is investigated in the framework of stochastic quantization. A criterion is given for a confinement of the sample path of gauge field c …

    Progress of Theoretical Physics 70(6), p1636-1647, 1983-12

    DOI  Cited by (1)

  • Particle Creation by Expanding Universe and Suppression of Supercooling

    Minoru HORIBE , Akiko HOSOYA , Fuculty of Education Fukui University , Department of Physics Osaka University

    We study particle creations by the background metric of the exponentially expanding Universe, which is accompanies with the first order phase transition. The number density of the created particles pa …

    Progress of Theoretical Physics 67(3), p816-827, 1982-03

    DOI 

  • Quantum Non-Abelian Gauge Theory in Time-Dependent External Fields-2-

    Minoru HORIBE , Akio HOSOYA , Faculty of Education Fukui University , Department of Physics Osaka University

    We study quantum Yang-Mills fields under the influence of intensive time-dependent background vector potentials induced by point particle sources. The method of mode mixing (i. e., Bogoliubov transfor …

    Progress of Theoretical Physics 67(1), p333-344, 1982-01

    DOI 

  • Dual Potential and Magnetic Loop Operator

    Akio HOSOYA , Kazuyasu SHIGEMOTO , Department of Physics Osaka University , Department of Physics Osaka University

    We study the non-Abelian gauge theory in a special gauge condition called radial gauge in which vector potentials can be expressed by field strengths up to the residual gauge freedom. Defining dual ve …

    Progress of Theoretical Physics 65(6), p2008-2022, 1981-06

    DOI 

  • A Comment on Quantum Fluctuations around Solitons

    Minoru HORIBE , Akio HOSOYA , Noboru YAMAMOTO , Department of Physics Osaka University , Department of Physics Osaka University , Department of Physics Osaka University

    Mode mixing formalism is applied to the fluctuation modes around soliton configurations for the purpose of looking at possible multiple productions of fluctuation quanta in the soliton collision proce …

    Progress of Theoretical Physics 65(3), p1068-1076, 1981-03

    DOI 

  • Quantum Non-Abelian Gauge Theory in Time-Dependent External Fields

    Minoru HORIBE , Akio HOSOYA , Department of Physics Osaka University , Department of Physics Osaka University

    We study quantum Yang-Mills fields under the influence of intensive time-dependent background vector potentials. The mode mixing formalism is constructed, which enables us to calculate the S-matrix el …

    Progress of Theoretical Physics 64(5), p1814-1827, 1980-11

    DOI 

  • A Baryon Number Generation Mechanism in the Expanding Universe

    Akio HOSOYA , Kunihiko UEHARA , Department of Physics Osaka University , Department of Physics Osaka University

    Motivated by the recent work of Toussaint, Treiman, Wilczek and Zee, we propose an explanation of the baryon number excess in the Universe as a quantum effect in curved space-time. Our mechanism neces …

    Progress of Theoretical Physics 62(6), p1596-1605, 1979-12

    DOI 

  • Path-Integral for a Colour Spin and Path-Ordered Phase Factor

    Jun ISHIDA , Akio HOSOYA , Department of Physics Osaka University , Department of Physics Osaka University

    Starting with a classical description of a colour spin, which interacts with the Yang-Mills fields, we derive a path-integral formula for transition amplitudes. Explicit integration gives a path-order …

    Progress of Theoretical Physics 62(2), p544-553, 1979-08

    DOI 

  • 1 / 2
Page Top