Quantum mean estimation for lattice field theory
Erik Gustafson, Henry Lamm, Judah Unmuth-Yockey
Abstract
exact expression for an observable of interest is written using a functional integral representation for the evolution operator, and tractable time-dependent mean field equations are obtained by application of the stationary-phase approximation (SPA) to the functional integral. Corrections to the lowest-order theory may be systematically enumerated. 6 figures. (RWR)