Speaker
Description
We present a method for accelerating topological transition in the 2D
Schwinger model with a compact U(1) gauge and Wilson fermions by
coupling the 2D lattice via a 3rd dimension with open boundary
conditions. The fermions live on the central slice. This allows
topological charge to flow into the central slice, which maintains
an integer valued winding. The resulting effective action on the
central slice is mapped to an effective 2D action of the canonical
Schwinger model. The rate of topological transition for that effective
action is significantly increased, modifications to the short range
action are suppressed, and the expected long behaviour is preserved.
Generalisation to 4 dimensional theories with SU(N) gauge groups
may offer a solution to the HMC topological freeze-out observed in current
lattice QCD simulations.
