Deterministic teleportation of a quantum gate between two logical qubits

Invited

Abstract


The demands of quantum error correction dictate that quantum computations be performed using error-protected logical qubits. The implementation of gates between logical qubits requires achieving the couplings necessary for the desired operation while minimizing residual interactions to maintain sufficient coherence and control. One promising approach to address this challenge is the modular architecture, where modules–which minimally consist of a logical qubit and an ancillary communication qubit–are isolated from each other except through specific quantum channels. In such a paradigm, operations are enabled via quantum teleportation, a technique that obviates the need for direct interaction between logical qubits. Instead, teleportation-based protocols utilize shared entanglement between modules, local operations, and classical communication to implement a quantum process. In a superconducting cQED architecture, we demonstrate a teleported CNOT gate between logical qubits encoded in microwave cavities, a promising hardware-efficient approach for quantum information. In this talk, we report on the implementation and characterization of this deterministic teleported quantum gate. By combining a hardware-efficient approach with the teleported operation, our results illustrate a compelling approach to implement multi-qubit gates on logical qubits that also is also an important component of a modular quantum architecture.

–

Presenters

  • Kevin Chou

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

Authors

  • Kevin Chou

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

  • Jacob Blumoff

    Physics and Applied Physics, Yale University, HRL Laboratories

  • Christopher Wang

    Dept. of Applied Physics, Yale University, Yale University

  • Philip Reinhold

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

  • Christopher Axline

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

  • Yvonne Gao

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

  • 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

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

  • Robert Schoelkopf

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