Multi-qubit entangling gates for spins in silicon

ORAL

Abstract

Implementing large-scale algorithms on a quantum computer will require efficient gate compilation strategies to reduce overhead. We recently demonstrated an efficient CNOT gate for spins in Si [1]. The gate operates in a regime where the magnetic field gradient exceeds exchange. By turning on exchange, it is possible to implement a CNOT gate in a single step using resonant microwave excitation. We will discuss possible extensions of the resonant gate in more complex device architectures [2] and present a detailed analysis of multi-qubit gate fidelities.

[1] Zajac et al., Science 359 6374 (2018)
[2] Zajac et al., Phys. Rev. Applied 6, 054013 (2016)

*Research sponsored by ARO grant No. W911NF-15-1-0149 and the Gordon and Betty Moore Foundation's EPiQS Initiative through Grant GBMF4535.

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Presenters

  • Michael Gullans

    • Princeton University
    • Department of Physics, Princeton University
    • Physics, Princeton University

Authors

  • Michael Gullans

    • Princeton University
    • Department of Physics, Princeton University
    • Physics, Princeton University

  • Jason R Petta

    • Princeton University
    • Department of Physics, Princeton University, Princeton, NJ 08544, USA
    • Physics, Princeton University
    • Department of Physics, Princeton University