# RIKEN Lunch Seminar

## "Generalized Nambu-Goldstone theorem"

#### Presented by Yoshimasa Hidaka, RIKEN

Thursday, March 2, 2017, 12:30 pm — Building 510, Room 2-160

Symmetry and its spontaneous breaking are of basic importance

for understanding the low energy physics in many-body systems. When a

continuum symmetry is spontaneously broken, there exist a zero mode

called Nambu-Goldstone (NG) mode, which is well developed in Lorentz

invariant systems. In contrast, in non-Lorentz invariant systems, the

NG theorem has not been well developed. In this talk, we discuss the

recent progress in generalization of NG theorem in non-relativistic systems,

open systems, and systems with higher form symmetries.

Hosted by: Hiromichi Nishimura

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