Real-Time Dynamics at Large $N$

Abstract

The large-$N$ limit of $O(N)$-symmetric bosonic field theories, or $U(N)$-symmetric fermionic field theories, is amenable to a saddle point approximation. As a result, there is a family of closely related algorithms for efficient lattice simulations in this limit, even in the presence of fermionic or real-time sign problems. These can be used to study quenches, or other observables for which

Comments: 7 pages, 3 figures; Talk presented at the 38th International Symposium on Lattice Field Theory, LATTICE2021 26th-30th July, 2021 Zoom/Gather@Massachusetts Institute of Technology