Abstract
Simulations of field theories on noisy quantum computers must contend with
errors introduced by that noise. For gauge theories, a large class of errors
violate gauge symmetry, and thus may result in unphysical processes occurring
in the simulation. We present a method, applicable to non-Abelian gauge
theories, for suppressing coherent gauge drift errors through the repeated
application of pseudorandom gauge transformation. In cases where the dominant
errors are gauge-violating, we expect this method to be a practical way to
improve the accuracy of NISQ-era simulations.
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