  Quantum computers offer the possibility to implement lattice gauge theory in
Minkowski rather than Euclidean spacetime, thus allowing calculations of
processes that evolve in real time. In this work, calculations within SU(2)
pure gauge theory are able to show the motion of an excitation traveling across
a spatial lattice in real time. This is accomplished by using a simple yet
powerful method for error mitigation, where the original circuit is used both
forward and backward in time. For a two-plaquette lattice, meaningful results
are obtained from a circuit containing hundreds of CNOT gates. The same method
is used for a five-plaquette lattice, where calculations show that residual
systematic effects can be reduced through follow-up mitigation.
