MR. SHABBIR SHAIKH

Large scale structure in the universe causes lensing of CMB. Similarly, stochastic gravitational wave background (SGWB) sourced at different redshifts can cause lensing of CMB. These gravitational waves introduce lensing potential which affects CMB temperature and polarization fluctuations by weak lensing. This effect is being used to constrain SGWB sourced at different redshifts. In this talk the speaker will discuss the weak lensing of CMB by SGWB. Method to constrain SGWB using its weak lensing effect on CMB will be discussed.