Implementation of dynamically corrected gates on a single electron spin in diamond

Precise control of an open quantum system is critical to quantum information processing but is challenging due to inevitable interactions between the quantum system and the environment. We demonstrated experimentally a type of dynamically corrected gates using only bounded-strength pulses on the nit...

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Bibliographic Details
Published in:Physical review letters 2014-02, Vol.112 (5), p.050503-050503, Article 050503
Main Authors: Rong, Xing, Geng, Jianpei, Wang, Zixiang, Zhang, Qi, Ju, Chenyong, Shi, Fazhan, Duan, Chang-Kui, Du, Jiangfeng
Format: Article
Language:English
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Summary:Precise control of an open quantum system is critical to quantum information processing but is challenging due to inevitable interactions between the quantum system and the environment. We demonstrated experimentally a type of dynamically corrected gates using only bounded-strength pulses on the nitrogen-vacancy centers in diamond. The infidelity of quantum gates caused by a nuclear-spin bath is reduced from being the second order to the sixth order of the noise-to-control-field ratio, which offers greater efficiency in reducing infidelity. The quantum gates have been protected to the limit essentially set by the spin-lattice relaxation time T1. Our work marks an important step towards fault-tolerant quantum computation in realistic systems.
ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.112.050503