On Tue, Sep 29, 2015 at 9:30 AM, Isaac Kim <ikim@perimeterinstitute.ca> wrote:

Please join us on Wednesday, Sep 30 at 4pm in the Time room for a quantum information seminar by Joel Wallman.

Title: Characterizing the coherence of errors

Abstract: I will introduce the unitarity, a parameter quantifying the coherence of a channel and show that it is useful for two reasons. First, it can be efficiently estimated via a variant of randomized benchmarking. Second, it captures useful information about the channel, such as the optimal fidelity achievable with unitary corrections and an improved bound on the diamond distance.