Tsujikawa, Phys. Rev. D 77, 023507 (2008)
Tsujikawa, Phys. Rev. D 77, 023507 (2008) Tsujikawa, Phys. Rev. D 77, 023507 (2008)
I. IntroductionNo. 3・ Recent observations of Supernova (SN) Ia confirmed thatthe current expansion of the universe is accelerating.[Perlmutter et al. [Supernova Cosmology Project Collaboration], Astrophys. J. 517,565 (1999)][Riess et al. [Supernova Search Team Collaboration], Astron. J. 116, 1009 (1998)][Astier et al. [The SNLS Collaboration], Astron. Astrophys. 447, 31 (2006)]・ There are two approaches to explain the current cosmicacceleration. [Copeland, Sami and Tsujikawa, Int. J. Mod. Phys. D 15, 1753 (2006)][Tsujikawa, arXiv:1004.1493 [astro-ph.CO]]< Gravitational field equation > G ö÷G ö÷ = ô 2 T ö÷GravityMatter(1) General relativistic approachT ö÷(2) Extension of gravitational theory2011 Nobel Prize in Physics: Einstein tensor: Energy-momentum tensor: Planck massDark Energy
- Page 1: Equation of state for dark energyin
- Page 5 and 6: Flat Friedmann-Lema tre-Robertson-W
- Page 7: 7-year WMAP data on the current val
- Page 10 and 11: f(R) gravity >No. 10Sf(R)2ô 2f(R)
- Page 12 and 13: Conditions for the viability of f(R
- Page 14 and 15: Crossing of the phantom divide >・
- Page 16 and 17: ・ It is known that in several via
- Page 18 and 19: We explicitly demonstrate that the
- Page 20 and 21: Gravitational field equations in th
- Page 22 and 23: Hu-Sawicki modelStarobinsky’s mod
- Page 24 and 25: No. 24*・: Gravitational field equ
- Page 26 and 27: IV. Effective equation of state for
- Page 28 and 29: Gravitational field equation >No. 2
- Page 30 and 31: ・It is known that the finite-time
- Page 32 and 33: We examine the asymptotic behavior
- Page 34 and 35: V. Summary・ We have discussed mod
- Page 36 and 37: Hu-Sawicki modelStarobinsky’s mod
- Page 38 and 39: ・・Hw eff = à 1 à 32H ç2(a)(b
- Page 40 and 41: Flat Friedmann-Lema tre-Robertson-W
- Page 42 and 43: Combining Equations (3) and (4), we
- Page 44 and 45: No. 31: Gravitational field equatio
- Page 46 and 47: Gravitational field equation >No. 3
- Page 48 and 49: A. Finite-time future singularities
- Page 51 and 52: Other model >・No. 18Appleby-Batty
I. IntroductionNo. 3・ Recent observations of Supernova (SN) Ia confirmed thatthe current expansion of the universe is accelerating.[Perlmutter et al. [Supernova Cosmology Project Collaboration], Astrophys. J. 517,565 (1999)][Riess et al. [Supernova Search Team Collaboration], Astron. J. 116, 1009 (1998)][Astier et al. [The SNLS Collaboration], Astron. Astrophys. 447, 31 (2006)]・ There are two approaches to explain the current cosmicacceleration. [Copeland, Sami and <strong>Tsujikawa</strong>, Int. J. Mod. <strong>Phys</strong>. D 15, 1753 (2006)][<strong>Tsujikawa</strong>, arXiv:1004.1493 [astro-ph.CO]]< Gravitational field equation > G ö÷G ö÷ = ô 2 T ö÷GravityMatter(1) General relativistic approachT ö÷(2) Extension of gravitational theory2011 Nobel Prize in <strong>Phys</strong>ics: Einstein tensor: Energy-momentum tensor: Planck massDark Energy
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