Tsujikawa, Phys. Rev. D 77, 023507 (2008)
Tsujikawa, Phys. Rev. D 77, 023507 (2008)
Tsujikawa, Phys. Rev. D 77, 023507 (2008)
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Gravitational field equation >No. 36・ The variation of the action with respect to ñ gives0: Energy-momentum tensor of matter(prime): Derivative with respect to< Flat Friedmann-Lema tre-Robertson-Walker (FLRW) metric >a(t): Scale factorñ・We consider the case in which the scalar fieldsdepend on time.ñøand only