Speaker
Dr
Guilherme Catumba
(University of Milano)
Description
Lattice field theory computations of two-point functions are generally
affected by the so called signal to noise problem, wherein the signal
of the Euclidean time correlator decays faster than the variance. In
this talk we propose a different perspective on the origin of this
problem. Following this, we argue that by writing correlators as
derivatives with respect to sources and evaluating these derivatives
using techniques of stochastic automatic differentiation we can
eliminate completely the signal to noise problem. Results in a four
dimensional scalar theory confirm the expected behavior.
