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Reducing intrinsic decoherence in a superconducting circuit by quantum error detection

zqyin 添加于 2013-9-3 09:39 | 1368 次阅读 | 0 个评论

作者
Zhong YP, Wang ZL, Martinis JM, Cleland AN, Korotkov AN, Wang H
摘要
A fundamental challenge for quantum information processing is reducing the impact of environmentally-induced errors. Quantum error detection (QED) provides one approach to handling such errors, in which errors are rejected when they are detected. Here we demonstrate a QED protocol based on the idea of quantum un-collapsing, using this protocol to suppress energy relaxation due to the environment in a three-qubit superconducting circuit. We encode quantum information in a target qubit, and use the other two qubits to detect and reject errors caused by energy relaxation. This protocol improves the storage time of a quantum state by a factor of roughly three, at the cost of a reduced probability of success. This constitutes the first experimental demonstration of an algorithm-based improvement in the lifetime of a quantum state stored in a qubit.
详细资料
- 关键词: quant-ph; cond-mat.supr-con
- 文献种类:手稿
- 期卷页: 2013年
- 日期: 2013-9-1
- 发布方式: arXiv e-prints
- 备注:arXiv:1309.0198v1; 10 pages, 5 figures, and 1 table including Supplementary Information
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