Expedited growth of massive black holes fed by repeated tidal disruption of stars

In this talk, we investigate dense nuclear clusters as the environment for massive black hole (MBH, supermassive or intermediate-mass) growth due to frequent dynamical interactions between stars the MBH. Once formed, the MBH's gravitational influence enables the accretion of surrounding field stars through a high rate of tidal disruption events, resulting in the buildup of a dense, optically thick gaseous disk or envelope. We find that the mass feeding rate onto the IMBH is further enhanced by tidal capture and interactions between stars and the accretion disk, potentially sustaining super-Eddington accretion, especially for IMBHs. These results suggest that dense nuclear clusters can support both the formation and substantial growth of MBHs. We also discuss how this scenario could be related to recent JWST observations of high-redshift ``little red dots'' (LRDs) and the early phase of SMBH growth.