Microwave activated two-photon transition for remote entanglement of superconducting circuits

Invited

Abstract

Building a large scale quantum computing platform or network will most probably require to entangle distant systems that do not interact directly. This can be done by performing entangling gates between standing information carriers, used as memories or local computationnal resources, and flying ones, acting as quantum buses. In this talk, we report the realization of such gates between superconducting circuits and traveling microwave photons based on microwave activated two-photon transitions. We have implemented this protocol in a superconducting circuit architecture. Temporal and, to some extent, frequential shaping of the traveling wavepacket have been applied. We demonstrate both an entangling gate corresponding to the emission of a shaped photon conditionned on the excitation of a circuit and a swap gate corresponding to the absorption of this photon by a distant circuit. Combining both, we remotely entangle two transmon qubits with a Bell state fidelity of 73 %, limited by losses in the transmission line and decoherence of each qubit.

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Presenters

  • Phillipe Campagne-Ibarcq

    Department of Applied Physics, Yale University, Applied Physics, Yale University, Laboratoire Pierre Aigrain, Ecole Normale Supérieure, Department of Applied Physics, Yale Univ

Authors

  • Phillipe Campagne-Ibarcq

    Department of Applied Physics, Yale University, Applied Physics, Yale University, Laboratoire Pierre Aigrain, Ecole Normale Supérieure, Department of Applied Physics, Yale Univ

  • Evan Zalys-Geller

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

  • Anirudh Narla

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

  • Shyam Shankar

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

  • Christopher Axline

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

  • Luke Burkhart

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

  • Wolfgang Pfaff

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

  • Philip Reinhold

    Applied Physics, Yale Univ, Yale University, Applied 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

  • 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

  • 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