Current theme: Integrable systems
Theoretical Physics
Generalization of the Nambu-Goldstone theorem
byYoshimasa Hidaka
Abstract:Symmetry and its spontaneous breaking are basic concepts in modern physics. When a continuum symmetry is spontaneously broken, there appears a gapless mode called the Nambu-Goldstone (NG) mode, which is developed in a Lorentz invariant system, and is known as the Nambu-Goldstone theorem. In this talk, we discuss the generalization of the Nambu-Goldstone theorem to various systems: a non-relativistic system, a system with higher-form symmetries, and open classical and quantum systems. We will show that there also appears an NG mode in these systems when symmetry is spontaneously broken.
Keywords:
Spontaneous symmetry breaking, higher form symmetry, open system.