Tomography of a superconducting phase qutrit

ORAL

Abstract

Benchmarking the fidelity of quantum state preparation and evolution is vital for further advances in quantum engineering. State and process tomography are normally used for such benchmarking of individual qubit and coupled qubit systems. We extend this procedure to a superconducting phase circuit operating with three levels (qutrit), and measure the 3X3 density matrix for a set of arbitrary prepared states and their evolution. We quantify the diagonal and off diagonal decays due to relaxation and decoherence and compare to simulation.

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Authors

  • Yoni Shalibo

    Racah Institute of Physics, Hebrew University of Jerusalem, Jerusalem 91904, Israel

  • Yaara Rofe

    Racah Institute of Physics, Hebrew University of Jerusalem, Jerusalem 91904, Israel

  • David Shwa

    Racah Institute of Physics, Hebrew University of Jerusalem, Jerusalem 91904, Israel

  • Felix Zeides

    Racah Institute of Physics, Hebrew University of Jerusalem, Jerusalem 91904, Israel

  • Matthew Neeley

    Department of Physics, University of California, Santa Barbara, California 93106, USA, UCSB

  • John Martinis

    Department of Physics, University of California, Santa Barbara, California 93106, USA, University of California, Santa Barbara

  • Nadav Katz

    Racah Institute of Physics, Hebrew University of Jerusalem, Jerusalem 91904, Israel