Hydrodynamic Modes and Operator Spreading in a Long-Range Center-of-Mass-Conserving Brownian Sachdev-Ye-Kitaev Model

Author(s): Bai-Lin Cheng, Shao-Kai Jian, and Zhi-Cheng Yang We study a center-of-mass-conserving Brownian complex Sachdev-Ye-Kitaev model with long-range (power-law) interactions characterized by $1/{r}^{η}$. The kinetic constraint and long-range interactions conspire to yield rich hydrodynamics associated with the conserved charge, which we reveal by comput… [Phys. Rev. Lett. 134, 156301] Published Tue Apr 15, 2025