@article{Mario2009MultiinstantonsAM,
title={Multi-instantons and multicuts},
author={M. Mari{\~n}o and R. Schiappa and M. Weiss},
journal={Journal of Mathematical Physics},
year={2009},
volume={50},
pages={052301}
}

We discuss various aspects of multi-instanton configurations in generic multicut matrix models. Explicit formulas are presented in the two-cut case and, in particular, we obtain general formulas for multi-instanton amplitudes in the one-cut matrix model case as a degeneration of the two-cut case. These formulas show that the instanton gas is ultradilute due to the repulsion among the matrix model eigenvalues. We exemplify and test our general results in the cubic matrix model, where multi… Expand