Berlin 2024 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 6: Semiconductor Qubits (joint session QI/HL)

HL 6.9: Talk

Monday, March 18, 2024, 12:15–12:30, HFT-FT 131

Quantum Gates with Oscillating Exchange Interaction — •Daniel Nguyen, Irina Heinz, and Guido Burkard — Department of Physics, University of Konstanz, D-78457 Konstanz, Germany

Two-qubit gates between spin qubits are often performed using a rectangular or an adiabatic exchange interaction pulse resulting in a CZ gate. An oscillating exchange pulse not only performs a CZ gate, but also enables the iSWAP gate, which offers more flexibility to perform quantum algorithms. We provide a detailed description for two-qubit gates using resonant and off-resonant exchange pulses, give conditions for performing the respective gates, and compare their performance to the state-of-the-art static counterpart. We find that for relatively low charge noise the gates still perform reliably and compare to the conventional CZ gate.

D. Q. L. Nguyen, I. Heinz, and G. Burkard, Quantum gates with oscillating exchange interaction (2023), arXiv:2303.18015 [quant-ph].

Keywords: spin qubits; quantum gates; oscillating exchange