Rapid optimization of working parameters of microwave-driven multilevel qubits for minimal gate leakage

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Issue Date
2005-09-16Author
Zhou, Zhongyuan
Han, Siyuan
Chu, Shih-I
Publisher
AMERICAN PHYSICAL SOC
Type
Article
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Show full item recordAbstract
We propose an effective method to optimize the working parameters (WPs) of microwave-driven quantum gates implemented with multilevel qubits. We show that by treating transitions between each pair of levels independently, intrinsic gate errors due primarily to population leakage to undesired states can be determined by spectroscopic properties of the qubits and minimized by choosing proper WPs. The validity and efficiency of the approach are demonstrated by applying it to optimize the WPs of two coupled rf SQUID flux qubits for controlled- NOT operation. The result of this independent transition approximation ( ITA) is in good agreement with that of dynamic method (DM). The ratio of the speed of ITA to that of DM scales exponentially as 2(n) when the number of qubits n increases.
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Citation
Zhou, ZY; Chu, SI; Han, SY. Rapid optimization of working parameters of microwave-driven multilevel qubits for minimal gate leakage. PHYSICAL REVIEW LETTERS. SEP 16 2005. 95(12).
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