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Takeshi Kobayashi

Portrait de Takeshi Kobayashi
Canadian Institute for Theoretical Astrophysics (CITA)
Phd: University of Tokyo 2011

Area of Research:
Phone: x7052

Research Interests

I have worked on early universe cosmology, focusing especially on its connections with microscopic physics. I am interested in obtaining a unified view of the early universe through theoretical physics (such as string theory, particle physics, or some other quantum gravity theory), as well as extracting information on high energy physics from cosmological observations.

Positions Held

  • 2011 - present Perimeter Institute for Theoretical Physics, Associate Postdoctoral Researcher
  • 2011 - present Canadian Institute for Theoretical Astrophysics, University of Toronto, Postdoctoral Fellow
  • 2011 - 2012 Research Center for the Early Universe, The University of Tokyo, Postdoctoral Fellow

Recent Publications

  • Takeshi Kobayashi, Niayesh Afshordi, Schwinger Effect in 4D de Sitter Space and Constraints on Magnetogenesis in the Early Universe, JHEP10(2014)166, arXiv: 1408.4141
  • Takeshi Kobayashi, Primordial Magnetic Fields from the Post-Inflationary Universe, JCAP05(2014)040, arXiv: 1403.5168
  • Michael Czerny, Takeshi Kobayashi, Fuminobu Takahashi, Running Spectral Index from Large-field Inflation with Modulations Revisited, Physics Letters B (2014), pp. 176-180, arXiv: 1403.4589
  • Naoya Kobayashi, Takeshi Kobayashi, Adrienne L. Erickcek, Rolling in the Modulated Reheating Scenario, JCAP01(2014)036, arXiv: 1308.4154
  • Takeshi Kobayashi, Ryosuke Kurematsu, Fuminobu Takahashi, Isocurvature Constraints and Anharmonic Effects on QCD Axion Dark Matter, JCAP09(2013)032, arXiv: 1304.0922
  • Takeshi Kobayashi, Fuminobu Takahashi, Tomo Takahashi, Masahide Yamaguchi, Spectator field models in light of spectral index after Planck, JCAP10(2013)042, arXiv: 1303.6255
  • Takeshi Kobayashi, Tomo Takahashi, Large Tensor-to-Scalar Ratio in Small-Field Inflation, Phys.Rev.Lett. 110 (2013) 231101, arXiv: 1303.0242
  • Masahiro Kawasaki, Takeshi Kobayashi, Fuminobu Takahashi, Non-Gaussianity from Axionic Curvaton, JCAP 1303 (2013) 016, arXiv: 1210.6595
  • Takeshi Kobayashi, Jun'ichi Yokoyama, Primordial Spikes from Wrapped Brane Inflation, JCAP02(2013)005, arXiv: 1210.4427
  • Takeshi Kobayashi, Tomo Takahashi, Runnings in the Curvaton, JCAP06(2012)004, arXiv: 1203.3011
  • Takeshi Kobayashi, Fuminobu Takahashi, Tomo Takahashi, Masahide Yamaguchi, Dark Radiation from Modulated Reheating, JCAP03(2012)036, arXiv: 1111.1336
  • Masahiro Kawasaki, Takeshi Kobayashi, Fuminobu Takahashi, Non-Gaussianity from Curvatons Revisited, Phys.Rev.D84:123506,2011, arXiv: 1107.6011

Seminars

  • Generating and Constraining Primordial Magnetic Fields, University of Waterloo
  • Generating and Constraining Primordial Magnetic Fields, The University of Texas at Austin
  • Generating and Constraining Primordial Magnetic Fields, Institute for Advanced Study
  • Primordial Magnetic Fields from the Post-Inflationary Universe, PASCOS 2014, University of Warsaw
  • Large Tensor-to-Scalar Ratio in Small-Field Inflation, GRAPPA, University of Amsterdam
  • Large Tensor-to-Scalar Ratio in Small-Field Inflation, APC, Université Paris Diderot-Paris 7
  • Large Tensor-to-Scalar Ratio in Small-Field Inflation, University of Guelph
  • Primordial Spikes from Wrapped Brane Inflation, CP3, Louvain University
  • Primordial Spikes from Wrapped Brane Inflation, Kavli IPMU, The University of Tokyo
  • Density Perturbations from Curvatons Revisited, McGill University
  • Density Perturbations from Curvatons Revisited, PASCOS 2012, Merida, Mexico
  • Perturbation Generating Mechanisms and Weird Signals in the Sky, RESCEU, Tokyo University
  • Density Perturbations from Curvatons Revisited, 5th Conference on String and Cosmology, Oita, Japan
  • Cosmological Density Perturbations from the Inflationary Universe, Tokyo University
  • D-Brane Inflation in String Cosmology, Toronto University
  • PIRSA:14020152, Large Tensor-to-Scalar Ratio in Small-Field Inflation, 2014-02-25, Particle Physics
  • PIRSA:12040058, Density Perturbations from Curvatons Revisited, 2012-04-24, Cosmology & Gravitation