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In recent years, intense theoretical and experimental efforts have been directed towards understanding the non-equilibrium dynamics of isolated quantum systems. In this talk, I will present some of our recent results in this area. In the first part of the talk, I will demonstrate that geometrically frustrated spin chains can host localized many-body eigenstates in the absence of disorder. This localization arises from an interaction induced quantum interference, and it can persist even when the many-body spectrum is thermalizing. I will highlight the qualitative differences between our model and models of many-body localization. In the second part of the talk, I will describe quantum information scrambling in a non-integrable spin chain composed of two ingredients - a nearest neighbor Ising coupling, and an infinite range XX interaction. I will argue that this model can exhibit fast scrambling, even though it is not known to be holographically dual to a black hole. I will discuss the quench dynamics of this system and conclude with a proposal to realize this model in state-of-the-art quantum emulator platforms. |