Coauthors: Joseph Emerson, Robin Blume-Kohout

I will introduce the quantum gate fidelity and discuss some of its basic properties. Much of the focus regarding the gate fidelity has been on finding its average and minimum over the set of input states. I will further characterize the gate fidelity by giving some different expressions for its variance. I will also discuss what features of the noise can be learned from this information. A procedure for finding the variance in the case of time-dependent noise will also be discussed.