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Explore the fundamental differences between thermalization processes in open versus isolated quantum systems through this 29-minute conference talk delivered at the International Centre for Theoretical Sciences. Examine how quantum systems reach thermal equilibrium under different environmental conditions, comparing the mechanisms and timescales involved when systems are either completely isolated from their surroundings or coupled to external reservoirs. Delve into the theoretical frameworks that govern thermalization in each scenario, including the role of energy exchange, decoherence, and the emergence of thermal states. Understand how open quantum systems can reach thermal equilibrium through interaction with their environment, while isolated systems must rely on internal dynamics and the eigenstate thermalization hypothesis. Analyze the implications of these different thermalization pathways for quantum statistical mechanics, many-body physics, and the broader understanding of nonequilibrium quantum dynamics. Gain insights into current research developments in quantum thermodynamics and their connections to experimental observations in cold-atom systems and other quantum platforms.
