An efficient method to compute the residual phase on a Lefschetz thimble

Cristoforetti, M. and Di Renzo, F. and Eruzzi, G. and Mukherjee, A. and Schmidt, C. and Scorzato, L. and Torrero, C.

PRD 89 114505 (2010), doi:10.1103/PhysRevD.89.114505