  The Hamiltonian approach can be used successfully to study the real-time
evolution of a non-Abelian lattice gauge theory on the available noisy quantum
computers. In this work, results from the real-time evolution of SU(2) pure
gauge theory on IBM hardware are presented. The long real-time evolution
spanning dozens of Trotter steps with hundreds of CNOT gates and the
observation of a traveling excitation on the lattice were made possible by
using a collection of error mitigation techniques. Self-mitigation is our novel
tool, which consists of using the same physics circuit as a noise-mitigation
circuit.
