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Towards Bell-state stabilization using the Very Small Logical Qubit (VSLQ) device: Part I

ORAL

Abstract

Preparing and stabilizing entangled states is critical to many quantum information tasks, including autonomous quantum error correction. Inspired by previous dissipation-engineering schemes[1,2], we propose an autonomous protocol that prepares and stabilizes an arbitrary Bell state between a pair of superconducting qubits. This is achieved by parametrically coupling the superconducting qubits to each other, and to two dissipative baths that are made of low-Q resonators. The parametric couplings are engineered through the dynamical modulation of the qubit-qubit and the qubit-cavity interaction strengths at three different frequencies with appropriate phases. Numerical simulation shows that high fidelities of >95% are reached for all the Bell states, under realistic circuit parameters well-achievable by current circuit-QED technology. We further demonstrate how this scheme is fully compatible and can be experimentally realized on the VSLQ circuit[1].
[1] E. Kapit. Phys. Rev. Lett.116, 150501 (2016)
[2] Y. Lu et al. Phys. Rev. Lett. 119, 150502 (2017)

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Presenters

  • Yao Lu

    University of Chicago, The James Franck Institute and Department of Physics, The University of Chicago

Authors

  • Yao Lu

    University of Chicago, The James Franck Institute and Department of Physics, The University of Chicago

  • Tanay Roy

    University of Chicago, The James Franck Institute and Department of Physics, The University of Chicago

  • Eliot Kapit

    Colorado Sch of Mines, Physics, Colorado School of Mines, Department of Physics, Colorado School of Mines

  • David I Schuster

    University of Chicago, Physics, University of Chicago, Department of Physics and the James Franck Institute, University of Chicago, The James Franck Institute and Department of Physics, University of Chicago, The James Franck Institute and Department of Physics, The University of Chicago