Experimental realization of single-shot nonadiabatic holonomic gates in nuclear spins

Experimental realization of single-shot nonadiabatic holonomic gates in nuclear spins
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核自旋中单次非绝热完整门的实验实现

DOI:
10.1007/s11433-017-9058-7
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发表时间:
2017-03
影响因子:
6.4
通讯作者:
Long GuiLu
Long GuiLu
中科院分区:
物理与天体物理1区
文献类型:
--
作者:
Li Hang;Liu Yang;Long GuiLu

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非绝热完整量子计算由于其对控制误差的鲁棒性而受到越来越多的关注。然而,所有先前的方案必须使用至少两个顺序实现的门来实现一般的单量子位门。基于最近的两个报告,我们构造了两个哈密顿量,并在一个两量子比特的核磁共振(NMR)系统中通过单次激发实现了实验实现的非绝热完整门。设计了一个量子电路,通过非周期性地演化一个工作量子比特和一个辅助量子比特,实现了两个分别沿沿着π x和π z轴旋转的非对易单量子比特完整门.利用为NMR量子信息处理器开发的序列编译器,我们优化了整个脉冲序列,使实现的总误差最小。最后,所有的非绝热完整门都达到了98%以上的高无衰减实验精度。
Nonadiabatic holonomic quantum computation has received increasing attention due to its robustness against control errors. However, all the previous schemes have to use at least two sequentially implemented gates to realize a general one-qubit gate. Based on two recent reports, we construct two Hamiltonians and experimentally realized nonadiabatic holonomic gates by a single-shot implementation in a two-qubit nuclear magnetic resonance (NMR) system. Two noncommuting one-qubit holonomic gates, rotating along ˆx and ˆz axes respectively, are implemented by evolving a work qubit and an ancillary qubit nonadiabatically following a quantum circuit designed. Using a sequence compiler developed for NMR quantum information processor, we optimize the whole pulse sequence, minimizing the total error of the implementation. Finally, all the nonadiabatic holonomic gates reach high unattenuated experimental fidelities over 98%.
非绝热完整门的鲁棒性
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