Interference between microwave quantum memories

ORAL

Abstract

The ability to generate arbitrary quantum states on-demand, detect them with high fidelity, and excellent coherence properties of 3D cQED systems make them ideal platforms to solve boson sampling problems and implement linear-optics quantum computation (LOQC). In order to realise such protocols, we need robust beamsplitter and phase-shifting operations between cQED elements. Here, we use an RF-driven, frequency-converting beamsplitter between two superconducting memories to implement cascaded Mach-Zehnder interferometers. We use the dispersive coupling to perform phase control on the memory and demonstrate in-situ manipulation of the interference between two microwave photons at different frequencies. We show that this implementation is directly extended to multiphoton states and hence, can be applied to simulate complex high dimensional boson statistics. It is also compatible with qubits encoded in multi-photon states of cavities for quantum error correction, making such operations valuable for implementing logical gates between protected qubits.

–

Presenters

  • Yvonne Gao

    Physics, Yale University, Dept. of Applied Physics, Yale University

Authors

  • Yvonne Gao

    Physics, Yale University, Dept. of Applied Physics, Yale University

  • Brian Lester

    Yale University, Applied Physics, Yale University, JILA, University of Colorado

  • Serge Rosenblum

    Yale University, Applied Physics, Yale University, Applied Physics, Yale Univ

  • Chen Wang

    Univ of Mass - Amherst, Physics, University of Massachusetts at Amherst, University of Massachusetts

  • Luigi Frunzio

    Yale University, Applied Physics, Yale University, Physics and Applied Physics, Yale University, Applied Physics, Yale Univ, Dept. of Applied Physics, Yale University, Department of Applied Physics, Yale Univ, Yale Univ, Departments of Applied Physics and Physics, Yale University

  • Michel Devoret

    Yale University, Applied Physics, Yale University, Department of Applied Physics, Yale University, Applied Physics, Yale Univ, Physics and Applied Physics, Yale University, Yale Univ, Dept. of Applied Physics, Yale University, Department of Applied Physics, Yale Univ

  • Liang Jiang

    Yale University, Applied Physics, Yale University, Yale, Dept. of Applied Physics, Yale University

  • Steven Girvin

    Yale University, Applied Physics, Yale University, Department of Physics, Yale University, Yale Quantum Institute, Yale University

  • Robert Schoelkopf

    Yale University, Applied Physics, Yale University, Physics and Applied Physics, Yale University, Applied Physics, Yale Univ, Dept. of Applied Physics, Yale University, Departments of Applied Physics and Physics, Yale University