Speaker
Description
We present a noise reduction technique for disconnected diagrams in lattice QCD correlation functions, using the $\eta$ meson as an illustrative example. The method constructs a noise-reduced interpolating operator by subtracting a truncated-gauge-configuration estimate of the disconnected contribution. The truncated configuration restricts the gauge field to a finite time-slice window around the operator location, yielding a valid gluonic operator whose subtraction reduces disconnected-diagram noise without introducing additional systematic error. The effective time separation between the two operators is reduced by the tunable parameter $\Delta t$, but the improved signal overlap compensates. We discuss the method, its properties, and preliminary numerical results.