Scalable protocol to mitigate $ZZ$ crosstalk in universal quantum gates

• URL: http://arxiv.org/abs/2307.05566v2
• Date: Sat, 10 Feb 2024 15:50:01 GMT
• Title: Scalable protocol to mitigate $ZZ$ crosstalk in universal quantum gates
• Authors: Yan Liang, Ming-Jie Liang, Sai Li, Z. D. Wang, and Zheng-Yuan Xue
• Abstract summary: High-fidelity universal quantum gates are widely acknowledged as essential for scalable quantum computation. In solid-state quantum systems, the inevitable $ZZ$ crosstalk resulting from interqubit interactions significantly impairs quantum operation performance. We propose a scalable protocol to achieve $ZZ$-crosstalk mitigation in universal quantum gates.
• Score: 2.920921569857048
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: High-fidelity universal quantum gates are widely acknowledged as essential for scalable quantum computation. However, in solid-state quantum systems, which hold promise as physical implementation platforms for quantum computation, the inevitable $ZZ$ crosstalk resulting from interqubit interactions significantly impairs quantum operation performance. Here we propose a scalable protocol to achieve $ZZ$-crosstalk mitigation in universal quantum gates. This method converts the noisy Hamiltonian with $ZZ$ crosstalk into a framework that efficiently suppresses all $ZZ$-crosstalk effects, leading to ideal target quantum operations. Specifically, we first analytically derive the $ZZ$-crosstalk mitigation conditions and then apply them to enhance the performance of target universal quantum gates. Moreover, numerical simulations validate the effectiveness of $ZZ$-crosstalk mitigation when multiple qubit gates operate concurrently. As a result, our protocol presents a promising approach for implementing practical parallel quantum gates in large-scale quantum computation scenarios.

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