Toward Resource-Efficient Deterministic Entanglement in 3D Superconducting Qubits

ORAL

Abstract

We present progress towards deterministic entanglement in a three-dimensional, superconducting qubit architecture, using only one continuous drive to engineer steady-state entanglement [1]. Our protocol uses two (nominally) identical copper waveguide cavities that each contain a transmon qubit. The cavities are directly coupled to one another and hybridize into symmetric and antisymmetric modes. The coupling of the cavities introduces a cavity-mediated qubit coupling that splits the degeneracy between the singlet and triplet states in the odd-parity subspace. By driving the cavities symmetrically and carefully tuning the single drive amplitude and frequency to take advantage of the hybridized cavity density of states, we aim to achieve bipartite entanglement that is stable against both dephasing and finite qubit lifetime. In this talk, we present experimental progress towards this cavity-assisted, bath engineered generation of entanglement. \\[4pt] [1] C. Aron, M. Kulkarni, \& H.E. Tureci. http://arxiv.org/abs/1403.6474

–

Authors

  • M.E. Schwartz

    QNL, University of California, Berkeley

  • L. Martin

    Whaley Research Group and QNL, University of California, Berkeley, QNL, University of California, Berkeley

  • C. Aron

    Princeton University, Department of Electrical Engineering, Princeton University

  • M. Kulkarni

    New York City College of Technology, New York City College of Technology, City University of New York

  • H.E. Tureci

    Princeton University, Department of Electrical Engineering, Princeton University

  • I. Siddiqi

    Quantum Nanoelectronics Laboratory, Department of Physics, University of California, Berkeley CA, QNL, University of California, Berkeley, University California Berkeley, University of California at Berkeley