Speaker
Yuji Hirono
(Tsukuba University)
Description
Symmetry provides a powerful organizing principle for low-energy effective theories. Higher-form symmetries extend this idea to systems with extended charged objects, such as lines and surfaces. From this viewpoint, photons can be regarded as Nambu-Goldstone modes of a spontaneously broken U(1) one-form symmetry. In this talk, I will discuss how this symmetry-based picture can be extended to finite-temperature real-time dynamics. Using the Schwinger-Keldysh formalism, we construct dissipative effective field theories for Nambu-Goldstone modes of higher-form symmetries.
Ref.
G. Yoshimura, Y. Akamatsu, Y. Hirono, JHEP 06 (2026) 051, arXiv:2601.00605