The Search For Primordial Tensor Modes

Abstract

We review the prospects for detecting tensor modes generated during inflation by CMB polarization experiments and by searching for a stochastic gravitational wave background with laser interferometers in space. We tackle the following two questions: (i) what does inflation predict for the tensor fluctuations? (ii) is it really worth building experiments that can cover only a small range of tensor amplitudes?

16 pages, 7 figures. Proceedings of YKIS 2005 meeting, `The Next Chapter in Einstein's Legacy', 27 June-1 July 2005, Yukawa Institute for Theoretical Physics, Kyoto. To be published in Progress of Theoretical Physics

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