"Why We Need a New Generation Framework for Migration in Accretion Disks -- Unusual Type I Migration in Turbulent or Windy Disks"
The study of the migration of low-mass companions embedded in accretion disks is of great significance for understanding the diversity and complexity of planetary systems, revealing the general principles of planet formation and evolution, and uncovering the mysteries of both our Solar System and exoplanetary systems. It also holds importance for the problem of gravitational wave (GW) production through stellar-mass black hole mergers in AGN disks. However, in the past decade, we have been treating accretion disks as laminar disks in numerical simulations and theoretical calculations, which leads to some issues. 1. For AGN disk environments, ignoring the real turbulence's effect on the migration of low-mass companions may result in the incorrect estimation of the merging efficiency of stellar-mass black holes in AGN disks. 2. For protoplanetary disks, neglecting the influence of MHD disk winds on planet migration. In this talk, I will introduce how I use numerical simulations to study the migration problems in turbulent disks and windy disks, and explain why we need to establish a new generation framework for migration in accretion disks.