A complex path around the sign problem in quantum field theory

Paulo Bedaque, University of Maryland
10/27, 2023 at 4:10PM-5PM in 939 Evans (for in-person talks) and https://berkeley.zoom.us/j/98667278310

We review recent attempts at dealing with the sign problem in Monte Carlo calculations by deforming the region of integration in the path integral from real to complex fields. We discuss the theoretical foundations, the algorithmic issues and present some results for low dimensional field theories in both imaginary and real time. A number of conceptual open questions will be discussed.