Title: Probing features during inflation with the stochastic gravitational wave background

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Abstract:
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Scalar fluctuations sourced during inflation, if sufficiently enhanced, induce a contribution to the stochastic gravitational wave background (SGWB) that can be detected by the upcoming generation of gravitational wave detectors. In this talk I will show that “features” during inflation, i.e. departures from single-field slow-roll inflation, lead to a characteristic signal in the SGWB. These departures from the single-field slow-roll paradigm can be significant at small scales, where CMB and LSS constraints do not apply. As a result, the SGWB offers a new way for probing inflation, on scales complementary to the ones probed by the CMB or LSS.