BEGIN:VCALENDAR VERSION:2.0 PRODID:researchseminars.org CALSCALE:GREGORIAN X-WR-CALNAME:researchseminars.org BEGIN:VEVENT SUMMARY:Guanhao Sun (Columbia U.) DTSTART:20211103T163000Z DTEND:20211103T173000Z DTSTAMP:20260423T024621Z UID:CMU-TP/41 DESCRIPTION:Title: Anisotropies in icosahedral inflation\nby Guanhao Sun (Columbia U.) as part of Carnegie Mellon theoretical physics\n\n\nAbstract\nIn this talk\, I will present recent work done on analyzing the unique observational imp rints of icosahedral inflation. Icosahedral inflation is a variation of so lid inflation\, in which the dynamics of the system are driven by a triple t of scalars satisfying internal icosahedral symmetry. This model is motiv ated by a hunt for an intrinsically anisotropic symmetry that gives isotro pic background stress tensor and two-point function\, and the model predic ts a completely isotropic scalar power spectrum while introducing anisotro pic corrections to the tensor power spectrum and the bispectrum. A mixed s calar-tensor two-point function is also allowed. Observationally\, it is p ossible to have a maximally anisotropic scalar bispectrum\, and non-zero T -B and E-B correlations for the CMB temperature-polarization spectrum. The statistical anisotropies also give rise to non-zero bipolar spherical har monics and bipolar power spectrum\, which are calculated and will be discu ssed in the talk.\n LOCATION:https://researchseminars.org/talk/CMU-TP/41/ END:VEVENT END:VCALENDAR