Prefer a chat interface with context about you and your work?
Resumming the large-<i>N</i>approximation for time evolving quantum systems
In this paper we discuss two methods of resumming the leading and next to leading order in $1/N$ diagrams for the quartic $O(N)$ model. These two approaches have the property that they preserve both boundedness and positivity for expectation values of operators in our numerical simulations. These approximations can be …