Explore quantum transport and discrete time-crystals in this lecture from the "Periodically and Quasi-periodically Driven Complex Systems" program. Delve into advanced topics in quantum physics, including terahertz and infrared driven quantum matter, shaken optical lattices, Floquet time crystals, and localization-delocalization physics in quasi-periodically driven systems. Learn about the interplay between closed quantum systems with time-dependent Hamiltonians, open quantum systems, and gauge theory of coupling between matter and radiation. Gain insights from the intersection of theory and experiment in quantum simulation and interpretation of results. Presented by Subhajit Sarkar at the International Centre for Theoretical Sciences, this 33-minute talk is part of a program bringing together experts from various quantum physics communities to foster interdisciplinary understanding and advancement in the field.