## Wenzer Qin (MIT) “Probing exotic energy injection with the CMB and early star formation”

Abstract: Dark matter interactions with Standard Model particles can inject energy at early times, altering the standard evolution of the early universe. In particular, this energy injection can perturb the spectrum of the cosmic microwave background (CMB) away from that of a perfect blackbody, alter the CMB anisotropy spectrum, and affect processes by which the first stars form. For this … Read More

## String Theory Seminar: Andreas Blommaert (SISSA) “DSSYK, Liouville gravity and the q-Schwarzian”

Abstract. I will discuss a new holographic duality between a 1d theory, the q-Schwarzian, and certain 2d dilaton gravity theories. This q-Schwarzian is a one parameter deformation of the well known Schwarzian theory. For real values of q, upon quantization, the q-Schwarzian mechanics exactly reproduces DSSYK amplitudes. For values of q on the unit circle, it exactly reproduces Liouville gravity … Read More