Cosmology seminar: Maresuke Shiraishi
Maresuke Shiraishi is a post-doc at INFN, Universita' degli Studi di Padova.
Eccentric CMB of symmetry-breaking origin
There are possibilities to violate invariances (e.g., Gaussianity, parity and isotropy) in primordial cosmological fluctuations. Such symmetry breakings will imprint very interesting signatures in late-time phenomena, which one may be possible to observe. Especially, CMB will change its face drastically, corresponding to the symmetry-breaking types, since the harmonic-space representation is very sensitive to the statistical, spin and angular dependences of cosmological perturbations.
In this talk, I would discuss (1) general responses of the symmetry breakings to CMB, (2) some theoretical models creating interesting CMB signatures, and (3) aspects of the estimation from observational data.