Parametric two-qubit gates via Landau-Zener interference

arXiv (Cornell University)

Abstract

We propose and demonstrate gates between two superconducting qubits based on quantum interference of consecutive Landau-Zener (LZ) transitions. This gate mechanism bridges between baseband and parametric two-qubit control, enabling in situ tuning of the control frequency across a continuous interval up to hundreds of MHz. Another advantage compared to dispersive couplers is that the speed of the LZ gate is on the order of the full coupling strength. We experimentally demonstrate the gate on two platforms, a modular chiplet architecture of coupled generalized flux qubits, and on a monolithic transmon architecture. The combination of tunability and gate speed establishes the LZ gate as a unique tool for multiplexing control pulses and interconnecting superconducting chiplet architectures.

Authors 26

1. Simon Geisert

   Karlsruhe Institute of Technology

   Affiliation as printed

   IQMT , Karlsruhe Institute of Technology , 76131 Karlsruhe , Germany

2. Albert Hertel
   Affiliation as printed

   Qruise GmbH , 66113 Saarbruecken , Germany

3. Soeren Ihssen

   Karlsruhe Institute of Technology

   Affiliation as printed

   IQMT , Karlsruhe Institute of Technology , 76131 Karlsruhe , Germany

4. Zhongyi Jiang

   Forschungszentrum Jülich

   Affiliation as printed

   PGI-12 , Forschungszentrum Juelich , 52428 Juelich , Germany

5. Paul Kugler

   Karlsruhe Institute of Technology

   Affiliation as printed

   IQMT , Karlsruhe Institute of Technology , 76131 Karlsruhe , Germany

6. Nicolas Zapata

   Karlsruhe Institute of Technology

   Affiliation as printed

   IQMT , Karlsruhe Institute of Technology , 76131 Karlsruhe , Germany

7. Nicolas Gosling

   Karlsruhe Institute of Technology

   Affiliation as printed

   IQMT , Karlsruhe Institute of Technology , 76131 Karlsruhe , Germany

8. Ameya Nambisan

   Karlsruhe Institute of Technology

   Affiliation as printed

   IQMT , Karlsruhe Institute of Technology , 76131 Karlsruhe , Germany

9. Yuan Gao Aachen Department of Physics

   Forschungszentrum Jülich · RWTH Aachen University

   Affiliation as printed

   Department of Physics , RWTH Aachen University , 52074 Aachen , Germany

   Institute for Functional Quantum Systems (PGI-13) , Forschungszentrum Jülich , 52425 Jülich , Germany

10. Asier Galicia Aachen Department of Physics

    Forschungszentrum Jülich · RWTH Aachen University

    Affiliation as printed

    Department of Physics , RWTH Aachen University , 52074 Aachen , Germany

    Institute for Functional Quantum Systems (PGI-13) , Forschungszentrum Jülich , 52425 Jülich , Germany

11. J. R. Guimarães Aachen Department of Physics

    Forschungszentrum Jülich · RWTH Aachen University

    Affiliation as printed

    Department of Physics , RWTH Aachen University , 52074 Aachen , Germany

    Institute for Functional Quantum Systems (PGI-13) , Forschungszentrum Jülich , 52425 Jülich , Germany

12. Yorgo Haddad Aachen Department of Physics

    Forschungszentrum Jülich · RWTH Aachen University

    Affiliation as printed

    Department of Physics , RWTH Aachen University , 52074 Aachen , Germany

    Institute for Functional Quantum Systems (PGI-13) , Forschungszentrum Jülich , 52425 Jülich , Germany

13. Marc Neis Aachen Department of Physics

    Forschungszentrum Jülich · RWTH Aachen University

    Affiliation as printed

    Department of Physics , RWTH Aachen University , 52074 Aachen , Germany

    Institute for Functional Quantum Systems (PGI-13) , Forschungszentrum Jülich , 52425 Jülich , Germany

14. Harsh Bhardwaj Aachen Department of Physics

    Forschungszentrum Jülich · RWTH Aachen University

    Affiliation as printed

    Department of Physics , RWTH Aachen University , 52074 Aachen , Germany

    Institute for Functional Quantum Systems (PGI-13) , Forschungszentrum Jülich , 52425 Jülich , Germany

15. Dmitriy A. Volkov Aachen Department of Physics

    Forschungszentrum Jülich · RWTH Aachen University

    Affiliation as printed

    Department of Physics , RWTH Aachen University , 52074 Aachen , Germany

    Institute for Functional Quantum Systems (PGI-13) , Forschungszentrum Jülich , 52425 Jülich , Germany

16. Juan Cereijo Aachen Department of Physics

    Forschungszentrum Jülich · RWTH Aachen University

    Affiliation as printed

    Department of Physics , RWTH Aachen University , 52074 Aachen , Germany

    Institute for Functional Quantum Systems (PGI-13) , Forschungszentrum Jülich , 52425 Jülich , Germany

17. Marcello P. Guardascione Aachen Department of Physics

    Forschungszentrum Jülich · RWTH Aachen University

    Affiliation as printed

    Department of Physics , RWTH Aachen University , 52074 Aachen , Germany

    Institute for Functional Quantum Systems (PGI-13) , Forschungszentrum Jülich , 52425 Jülich , Germany

18. Yebin Liu

    Forschungszentrum Jülich

    Affiliation as printed

    Institute for Functional Quantum Systems (PGI-13) , Forschungszentrum Jülich , 52425 Jülich , Germany

19. Markus Jerger

    Forschungszentrum Jülich

    Affiliation as printed

    Institute for Functional Quantum Systems (PGI-13) , Forschungszentrum Jülich , 52425 Jülich , Germany

20. Pavel A. Bushev

    Forschungszentrum Jülich

    Affiliation as printed

    Institute for Functional Quantum Systems (PGI-13) , Forschungszentrum Jülich , 52425 Jülich , Germany

21. Frank Wilhelm-Mauch

    Forschungszentrum Jülich

    Affiliation as printed

    PGI-12 , Forschungszentrum Juelich , 52428 Juelich , Germany

    Qruise GmbH , 66113 Saarbruecken , Germany

22. Wolfgang Wernsdorfer

    Karlsruhe Institute of Technology · Karlsruhe University of Education

    Affiliation as printed

    IQMT , Karlsruhe Institute of Technology , 76131 Karlsruhe , Germany

    PHI , Karlsruhe Institute of Technology , 76131 Karlsruhe , Germany

23. Shai Machnes
    Affiliation as printed

    Qruise GmbH , 66113 Saarbruecken , Germany

24. Mohammad Ansari
25. Rami Barends

    Forschungszentrum Jülich

    Affiliation as printed

    Institute for Functional Quantum Systems (PGI-13) , Forschungszentrum Jülich , 52425 Jülich , Germany

26. Ioan M. Pop