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Event Number 3090
Thursday, October 31st, 2013
 R. G. Herb Condensed Matter Seminar
 Robust, selfconsistent, closedform tomography of quantum logic gates on a trapped ion qubit
 Time: 10:00 am
 Place: 5310 Chamberlin Hall
 Speaker: John Gamble, Sandia National Laboratory
 Abstract: We introduce and demonstrate experimentally: (1) a framework called "gate set tomography" (GST) for selfconsistently characterizing an entire set of quantum logic gates on a blackbox quantum device; (2) an explicit closedform protocol for linearinversion gate set tomography (LGST), whose reliability is independent of pathologies such as local maxima of the likelihood; and (3) a simple protocol for objectively scoring the accuracy of a tomographic estimate without reference to target gates, based on how well it predicts a set of testing experiments. We use gate set tomography to characterize a set of Cliffordgenerating gates on a single trappedion qubit, and compare the performance of (i) standard process tomography; (ii) linear gate set tomography; and (iii) maximum likelihood gate set tomography. arXiv:1310.4492
 Host: Coppersmith
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