Universality of pseudo-Goldstone damping near critical points
arXiv:2403.03503 · doi:10.1038/s41467-025-58170-1
Abstract
Real-time dynamics of strongly correlated systems, in particular its critical dynamics near phase transitions, have been always on the cutting edge of studies in diverse fields of physics, e.g., high energy physics, condensed matter, holography, etc. In this work, we investigate the critical damping of collective modes associated with spontaneous breaking of approximate symmetries, which are called pseudo-Goldstone modes, in strongly correlated systems. Using the Schwinger-Keldysh field theory, we find a universal pseudo-Goldstone damping via the critical O() model that has never been found before by other approaches. Different from the conventional damping found in holography and hydrodynamics, the new one is controlled by critical fluctuations, hence is invisible in mean-field systems or strongly correlated systems with classical gravity duals. Since the critical damping depends solely on the universalities of the critical point, irrespective of the microscopic details, our conclusion should be applicable to a wide class of interacting systems.
V2: version to be published in Nature Communications
References in corpus (19)
- Nonthermal fixed points and the functional renormalization group
- Locating the critical endpoint of QCD: mesonic backcoupling effects
- Functional renormalisation group approach to far-from-equilibrium quantum field dynamics
- QCD at finite temperature and density within the fRG approach: An overview
- Transport and hydrodynamics in the chiral limit
- Pseudo-spontaneous Symmetry Breaking in Hydrodynamics and Holography
- Damping of Pseudo-Goldstone Fields
- Dynamics of the critical point in QCD
- Approximate symmetries, pseudo-Goldstones, and the second law of thermodynamics
- Dynamic universality class of large-N gauge theories
- Pion dynamics in a soft-wall AdS-QCD model
- Dissipation in Holographic Superfluids
- Real-time methods for spectral functions
- Real-time dynamics of the scalar theory within the fRG approach
- Hydrodynamic effective field theory and the analyticity of hydrostatic correlators
- Nearly Critical Holographic Superfluids
- Dissipation dynamics of a scalar field
- Nearly Critical Superfluids in Keldysh-Schwinger Formalism
- Transverse Goldstone mode in holographic fluids with broken translations