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Learn about Nambu-Goldstone modes and their behavior in both closed and open many-body systems through this one-hour conference lecture delivered by M. Hongo from Niigata University. Explore the fundamental principles governing these collective excitation modes that arise from spontaneous symmetry breaking, examining how their properties and dynamics differ between isolated systems and those coupled to external environments. Discover the theoretical framework for understanding these modes in non-equilibrium contexts, including their role in effective field theories for many-body systems far from thermal equilibrium. Gain insights into the mathematical formalism used to describe these phenomena and their applications in condensed matter physics, quantum field theory, and statistical mechanics.
