Gravitational Waves in f (R ) Gravity
ZHOU Xiao-Ying1** , HE Jian-Hua2
1 Department of Physics, Fudan University, Shanghai 2004332 INAF-Observatorio Astronomico, di Brera, Via Emilio Bianchi, 46, I-23807, Merate (LC), Italy
Abstract ：We investigate the imprint of the tensor perturbation on the angular power spectra of the cosmic microwave background in the f (R ) gravity. Comparing with the scalar perturbation, we find that the tensor perturbation in the f (R ) gravity has little impact on the temperature angular power spectra. There is also little impact of the tensor perturbation in the f (R ) gravity on the E and B types of angular power spectra.
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2014, Vol. 31 
