Two-qubit spectroscopy of spatiotemporally correlated noise in superconducting qubits. Part 2: experiment

ORAL

Abstract

Fault-tolerant quantum computing relies on quantum error correction techniques. Most of these correction schemes assume the noise causing errors to exhibit only weak, spatially decaying correlations between distinct qubits. To investigate these assumptions experimentally, there is a need to extend established noise spectroscopy techniques from single- to multi-qubits systems. In this work, we present experiments on correlated dephasing of two superconducting qubits due to photon shot noise in a shared microwave cavity. Utilizing both free and driven evolution protocols, we demonstrate a frequency-selective method to probe the two-qubit correlations, and show how quantum noise spectroscopy techniques can reconstruct both single-qubit and two-qubit cross-spectra.

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Presenters

  • Uwe Von Luepke

    Research Laboratory of Electronics, Massachusetts Institute of Technology

Authors

  • Uwe Von Luepke

    Research Laboratory of Electronics, Massachusetts Institute of Technology

  • Felix Beaudoin

    Department of Physics and Astronomy, Dartmouth College, Dartmouth College

  • Leigh Norris

    Department of Physics and Astronomy, Dartmouth College, Dartmouth College

  • Youngkyu Sung

    Research Laboratory of Electronics, Massachusetts Institute of Technology, Massachusetts Institute of Technology

  • Morten Kjærgaard

    Research Laboratory of Electronics, Massachusetts Institute of Technology, Massachusetts Institute of Technology, Niels Bohr Institute, Research Laboratory of Electronics, Massachusetts Institute of Technology, USA

  • Dan Campbell

    Research Laboratory of Electronics, Massachusetts Institute of Technology

  • David K Kim

    MIT Lincoln Lab, Lincoln Laboratory, Massachusetts Institute of Technology, MIT Lincoln Laboratory, Massachusetts Institute of Technology, Massachusetts Institute of Technology Lincoln Laboratory, Lincoln Lab, Massachusetts Institute of Technology, USA, MIT Lincoln Laboratory, Massachusetts Institute of Technology

  • Jonilyn L Yoder

    MIT Lincoln Lab, Lincoln Laboratory, Massachusetts Institute of Technology, MIT Lincoln Laboratory, Massachusetts Institute of Technology, Massachusetts Institute of Technology Lincoln Laboratory, Lincoln Lab, Massachusetts Institute of Technology, USA, MIT Lincoln Laboratory, 244 Wood Street, Lexington, MA 02421, MIT Lincoln Laboratory, Massachusetts Institute of Technology

  • Ioan-Mihai Pop

    Karlsruhe Institute of Technology, Physikalisches Institut, Karlsruhe Institute of Technology, Physics, Karlsruhe Institute of Technology, Physikalisches Institut, Karlsruhe Institute of Technology, 76131 Karlsruhe, Germany

  • Lorenza Viola

    Department of Physics and Astronomy, Dartmouth College, Dartmouth College

  • Simon Gustavsson

    Research Laboratory of Electronics, Massachusetts Institute of Technology, Massachusetts Institute of Technology, Research Laboratory of Electronics, Massachusetts Institute of Technology, USA, Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, MA 02139, Research Laboratory of Electronics, MIT

  • William D Oliver

    Research Laboratory of Electronics, Massachusetts Institute of Technology, Department of Physics, Research Laboratory of Electronics, Lincoln Laboratory, Massachusetts Institute of Technology, MIT Lincoln Lab, MIT Lincoln Laboratory, Department of Physics, Massachusetts Institute of Technology, MIT Lincoln Laboratory, Massachusetts Institute of Technology, Research Laboratory of Electronics, Physics, Lincoln Laboratory, Massachusetts Institute of Technology, Department of Physics, Massachusetts Institute of Technology, Research Laboratory of Electronics, Massachusetts Institute of Technology, MIT Lincoln Laboratory, Physics, Massachusetts Institute of Technology, Dept. of Physics, Research Laboratory of Electronics, and Lincoln Lab, Massachusetts Institute of Technology, USA, Research Laboratory of Electronics, Department of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, MIT Lincoln Laboratory, 244 Wood Street, Lexington, MA, Massachusetts Institute of Technology and MIT Lincoln Laboratory, Research Laboratory of Electronics, MIT Lincoln Laboratory, Department of Physics, Massachusetts Institute of Technology, Department of Physics, Research Laboratory of Electronics, MIT Lincoln Laboratory, Massachusetts Institute of Technology, Department of Physics, MIT; Research Laboratory of Electronics, MIT; MIT Lincoln Laboratory