Physics

Abstract: I will review the correspondence between highly excited strings and black holes in the presence of angular momentum. At fixed imaginary angular velocity $\nu$, free strings exhibit a Hagedorn instability, explained—as in Atick and Witten...

Abstract: In arxiv.org/abs/2306.16687 we developed a general construction of bulk 1+1d geometry from the two-point function of a generalized free field at the 0+1d boundary. This construction was numerical and requires discretization of time. In...

Abstract: Gravitational lensing by galaxy clusters has emerged as a powerful tool to probe the standard CDM paradigm of structure formation in the Universe. Despite the remarkable explanatory power of CDM on large scales, tensions with observations...

Abstract: We present a wholly self-consistent, complete cyclic bouncing cosmology based on components drawn from string theory and constructed in a way that is under perturbative control throughout (e.g., with temperatures well below the string...

Abstract: Entanglement growth at late times is explained by the membrane picture in various chaotic quantum systems. In this work, we discuss entanglement growth in the large N Brownian SYK chain. We prepare an infinite-temperature thermofield...

Abstract: In this talk, I will discuss Cosmohedra. These are geometric objects which encode the vacuum wavefunction for theories with colored scalars with cubic interactions. I will start by introducing the vacuum wavefunction, both in Minkowski and...

Abstract: Recently a fruit fly brain was reconstructed in electron microscopic detail. Tens of millions of synapses were identified on over 100,000 neurons' entangled branches, which would span a football field if unraveled end to end. This "fly...

Abstract: I will briefly review one-loop gravitational path integral around Euclidean de Sitter space $S^D$, focusing on a complex phase which was recently proposed to be mostly canceled by including an observer. I will then explore this proposal in...

Abstract: I will briefly review the obstacles to constructing Anti–de Sitter vacua in string theory with very small extra dimensions compared to the AdS length, and the main ideas proposed to overcome them. I will then focus on a particular class of...