Crosstalk analysis for simultaneously driven two-qubit gates in spin qubit arrays

• URL: http://arxiv.org/abs/2111.10174v1
• Date: Fri, 19 Nov 2021 12:04:32 GMT
• Title: Crosstalk analysis for simultaneously driven two-qubit gates in spin qubit arrays
• Authors: Irina Heinz and Guido Burkard
• Abstract summary: Crosstalk errors are caused by control operations on neighboring qubits. We analyse the impact of crosstalk drives on qubit operations, such as the CNOT and CPHASE gates. To minimize crosstalk errors, we develop appropriate control protocols.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: One of the challenges when scaling up semiconductor-based quantum processors consists in the presence of crosstalk errors caused by control operations on neighboring qubits. In previous work, crosstalk in spin qubit arrays has been investigated for non-driven single qubits near individually driven quantum gates and for two simultaneously driven single-qubit gates. Nevertheless, simultaneous gates are not restricted to single-qubit operations but also include frequently used two-qubit gates such as the CNOT gate. We analyse the impact of crosstalk drives on qubit operations, such as the CNOT and CPHASE gates. We investigate the case of parallel $Y$ and CNOT gates, and we also consider a two-dimensional arrangement of two parallel CNOT gates and find unavoidable crosstalk. To minimize crosstalk errors, we develop appropriate control protocols.

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