PIRSA:19060030

Maximally sensitive sets of states

Gottesman, D. (2019). Maximally sensitive sets of states. Perimeter Institute. https://pirsa.org/19060030

Gottesman, Daniel. Maximally sensitive sets of states. Perimeter Institute, Jun. 13, 2019, https://pirsa.org/19060030 

          @misc{ pirsa_19060030,
            doi = {10.48660/19060030},
            url = {https://pirsa.org/19060030},
            author = {Gottesman, Daniel},
            keywords = {Condensed Matter},
            language = {en},
            title = {Maximally sensitive sets of states},
            publisher = {Perimeter Institute},
            year = {2019},
            month = {jun},
            note = {PIRSA:19060030 see, \url{https://pirsa.org}}
          }

Daniel Gottesman Perimeter Institute for Theoretical Physics

DOI 10.48660/19060030
Collection
Talk Type Conference
Subject

Abstract

Coherent errors in a quantum system can, in principle, build up much more rapidly than incoherent errors, accumulating as the square of the number of qubits in the system rather than linearly. I will characterize the types of channels that can exhibit such behavior and present a simple protocol that can detect and characterize coherent errors whenever they are present, no matter what their nature. This allows us to identify coherent errors in gates and measurements to within a constant fraction of the maximum possible sensitivity to such errors.