Time-Resolved Quantum Process Tomography of a Compact 3D Quantum Memory

POSTER

Abstract

Storing a photonic state in a 3D superconducting cavity as long as possible and reading out its information as fast as possible is a challenging task due to the conflicting requirements regarding the coupling strength between the cavity and readout circuit. This problem can be solved by a multimode compact 3D memory scheme employing a wealky and strongly coupled storage and readout mode with both coupled to a transmon qubit [Xie et al., Appl. Phys. Lett. 112, 202601 (2018)]. However, comparing the experimental data of the time evolution of the quantum process tomography with an empirical simulation, we saw difference in the relaxation behavior become obvious. To clarify this issue we perform an ab initio quantum simulations. In particular, these simulations allow us to understand yet unknown physics behind the compact 3D memory design and improve the protocol for the quantum memory process.

*We acknowledge support by the German Research Foundation through the Munich Center for Quantum Science and Technology (MCQST), Elite Network of Bavaria through the program ExQM, EU Flagship project QMiCS (Grant No. 820505)

Presenters

  • Yuki Nojiri

    • Walther-Meißner-Institute, Bavarian Academy of Sciences and Humanities & Physik-Department, Technische Universität München, Germany

Authors

  • Yuki Nojiri

    • Walther-Meißner-Institute, Bavarian Academy of Sciences and Humanities & Physik-Department, Technische Universität München, Germany

  • Frank Deppe

    • Walther-Meißner-Institut, Bavarian Academy of Sciences and Humanities
    • Walther-Meißner-Institute, Bavarian Academy of Sciences and Humanities & Physik-Department, Technische Universität München, Germany

  • Michael Renger

    • Walther-Meißner-Institut, Bavarian Academy of Sciences and Humanities
    • Walther-Meißner-Institute, Bavarian Academy of Sciences and Humanities & Physik-Department, Technische Universität München, Germany

  • Qiming Chen

    • Walther-Meißner-Institut, Bavarian Academy of Sciences and Humanities
    • Walther-Meißner-Institute, Bavarian Academy of Sciences and Humanities & Physik-Department, Technische Universität München, Germany

  • Stefan Pogorzalek

    • Walther-Meißner-Institut, Bavarian Academy of Sciences and Humanities
    • Walther-Meißner-Institute, Bavarian Academy of Sciences and Humanities & Physik-Department, Technische Universität München, Germany

  • Matti Partanen

    • QCD Labs, Aalto University
    • Walther-Meißner-Institut, Bavarian Academy of Sciences and Humanities
    • Walther-Meißner-Institut, Technische Universität München
    • Walther-Meißner-Institute, Bavarian Academy of Sciences and Humanities & Physik-Department, Technische Universität München, Germany
    • QCD Labs, Department of Applied Physics, Aalto University

  • Kirill Fedorov

    • Walther-Meißner-Institut, Bavarian Academy of Sciences and Humanities
    • Walther-Meißner-Institute, Bavarian Academy of Sciences and Humanities & Physik-Department, Technische Universität München, Germany

  • Achim Marx

    • Walther-Meißner-Institut, Bavarian Academy of Sciences and Humanities
    • Walther-Meißner-Institute, Bavarian Academy of Sciences and Humanities & Physik-Department, Technische Universität München, Germany

  • Rudolf Gross

    • Walther-Meißner-Institut, Bavarian Academy of Sciences and Humanities
    • Walther-Meissner-Institut, Bayerische Akademie der Wissenschaften, 85748 Garching, Germany
    • Walther-Meißner-Institut, Bavarian Academy of Sciences and Humanities, Garching, Germany
    • Walther Meißner Institut
    • Walther-Meißner-Institute, Bavarian Academy of Sciences and Humanities & Physik-Department, Technische Universität München, Germany