Export citation

Export citation

Choose format for download:

Download Citation

    Counterdiabatic route for preparation of state with long-range topological order

    Sanjeev Kumar, Shekhar Sharma, and Vikram Tripathi

    • Department of Theoretical Physics, Tata Institute of Fundamental Research, Homi Bhabha Road, Navy Nagar, Mumbai 400005, India

    Phys. Rev. B 104, 245113 – Published 8 December, 2021

    DOI: https://doi.org/10.1103/PhysRevB.104.245113

    Abstract

    We propose here a counterdiabatic (CD) strategy for the fast preparation of a state with long-range topological order by magnetic field tuning of an initial separable state. For concreteness, we consider the ground state of the honeycomb Kitaev model whose long-range topological order together with the anyonic excitations make it an interesting candidate for fault-tolerant universal quantum computation and storage. We implement an approximate local CD perturbation having the form of the off-diagonal exchange interactions in Kitaev Hamiltonians. The counterdiabatically produced state is found to have a high fidelity (≳0.5) and retains numerous desired entanglement properties while giving a speed-up of the order of 106. In our study of up to 24-spin clusters we found the fidelity is constrained by the spectral gap rather than the system size.

    Physics Subject Headings (PhySH)

    Authorization Required

    We need you to provide your credentials before accessing this content.

    References (Subscription Required)

    Outline

    Information

    Sign In to Your Journals Account

    Filter

    Filter

    Article Lookup

    Enter a citation