  One of the biggest challenges for implementing quantum devices is the
requirement to perform accurate quantum gates. The destructive effects of
interactions with the environment present some of the most difficult obstacles
that must be overcome for precise quantum control. In this work we implement a
proof of principle experiment of quantum gates protected against a fluctuating
environment using dynamical decoupling techniques. We show that decoherence can
be reduced during the application of quantum gates. High fidelity quantum gates
can be achieved even if the gate time exceeds the decoherence time by one order
of magnitude.
